Statistik
Datenanalyse, Wahrscheinlichkeitsverteilungen und Hypothesentests.
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directions: from video lecture #1 a question was posed and i want you t…
There is no single - correct answer as it is a self - reflective question. However, possible aspects could include citizenship status, adherence to American cultural values like f…
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use z - scores to compare the given values. the tallest living man at o…
Since the z - score for the tallest man is $z\approx10.15$ and the z - score for the shortest man is $z\approx - 14.02$, the shortest man had the height that was more extreme.
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in designing a work - desk, it is found that males have sitting knee he…
a. A. Heights that are less than $17.4$ in b. B. Heights that are greater than $26.2$ in c. A. Heights that are greater than $17.4$ in and less than $26.2$ in
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the venn diagram on the right shows the results of a gfk roper public a…
C. The statement is false because 93% of those surveyed liked cats or dogs.
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a successful basketball player has a height of 6 feet 3 inches, or 191 …
2.31
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the blood platelet counts of a group of women have a bell - shaped dist…
a. 99.7 b. 68
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use the body temperatures, in degrees fahrenheit, listed in the accompa…
within $0.2^{\circ}$ of
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use the body temperatures, in degrees fahrenheit, listed in the accompa…
The estimated standard deviation is $0.78^{\circ}F$. The estimated standard deviation is within $0.2^{\circ}F$ of the actual standard deviation. Thus, the estimated standard devia…
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2 the stem and leaf plots below show the grades for an exam in two diff…
(a) 1st class: 25, 44.5, 70.5, 96, 100; 2nd class: 21, 54.5, 65, 76, 100 (b) 1st class IQR = 51.5; 2nd class IQR = 21.5 (c) 1st class outlier(s) (if any) = None; 2nd class outlier…
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listed below are prices in dollars for one night at different hotels in…
The range of the sample data is $186.0$ dollars The standard deviation of the sample data is $55.8$ dollars The variance of the sample data is $3108.8$ dollars$^2$ A. The measures…
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9. what is the probability of spinning these two spinners and having ea…
$0.2$
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8. a nickel is tossed, a number - cube with faces labeled 1 - 6 is roll…
D. $\frac{1}{8}$
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arturo rolls two six - sided number cubes, with faces labeled 1 - 6, as…
6. B. $\frac{5}{36}$ 7. B. $\frac{1}{9}$
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use the following information for questions 6 and 7. arturo rolls two s…
B. $\frac{5}{36}$
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a random sample of 10 subjects have weights with a standard deviation o…
131.5094 kg²
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5. gina has a bag containing 5 red, 4 yellow, and 6 blue tiles that are…
D. $\frac{4}{45}$
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case is going to toss three coins simultaneously. what is the probabili…
1. D. $\frac{3}{8}$ 2. D. $\frac{1}{2}$
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histogram checklist: title the histogram bars are connected label the y…
1. 6-8 hours (or 8-10 hours, depending on interval definition) 2. 6-8 hours (most frequent interval) 3. Approximately 2.78% (if smallest frequency=1 and total=36)
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3. cadie is going to toss three coins simultaneously. what is the proba…
D. $\frac{3}{8}$
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listed below are amounts (in millions of dollars) collected from parkin…
A. The mean and the median for the security company are both lower than the mean and the median for the collections performed by other companies B. Since the security company appe…
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i am going to toss three coins simultaneously. what is the probability …
None of the provided options are correct. The correct probability is $\frac{3}{8}$.
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banquet hall has two types of tables, rectangular and round. the rectan…
a. The standard - form equation is \(4x + 3y=96\) b. The x - intercept is 24. It means that if no round tables are used, 24 rectangular tables are needed to seat 192 people. c. Th…
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2. what is the probability of tossing a number - cube labeled 1 - 6 and…
C. $\frac{1}{4}$
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choose the correct answer. 1. probability of the spinner a. $\frac{1}{2…
C. \(\frac{3}{8}\)
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1. what is the probability of the spinner? 2. what is the probability o…
C. \(\frac{3}{8}\) 2.
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which technique for gathering data (observational study or experiment) …
(a) This is an observational study because observations and measurements of individuals are conducted in a way that doesn't change the response or the variable being measured. (b)…
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(d) subscribers to a new smart phone app that streams songs were assign…
(d) simple random sample (e) stratified sample
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in line 66, when hektor says, \let me at least not die without a strugg…
He knows he is going to die but intends to die heroically.
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categorize the type of sampling (simple random, stratified, systematic,…
(a) cluster sample (b) convenience sample (c) systematic sample
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find the midrange for the following group of data items. 128, 68, 98, 6…
98
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find the mode for the data items in the given frequency distribution. |…
5
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for the following set of numbers, find the median. 43, 60, 56, 35, 40, …
$45$
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find the mean for the data items in the given frequency distribution. |…
$6.500$
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find the mean for the following group of data items. 8, 5, 3, 7, 2, 9, …
$4.75$
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this histogram shows the breakdown of exam scores in a math class. if a…
30
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1. the data show below give the total runs scored by both teams during …
a. | Total runs scored | Tally | Frequency | |-------------------|-------|-----------| | 4 | \| | 1 | | 5 | \||||\| | 6 | | 7 | \|\|\| | 3 | | 8 | \| | 1 | | 9 | \|\| | 2 | | 11 |…
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among fatal plane crashes that occurred during the past 50 years, 650 w…
Pilot error: 39.3% Other human error: 4.9% Weather: 4.6% Mechanical problems: 38.7% Sabotage: 12.4% D. Pilot error is the most serious threat to aviation safety. Pilots could be b…
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a pharmacy is presented with a prescription for 40 tablets of a schedul…
First question: 72 hr Second question: DEA
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a questionnaire was given to students in an introductory statistics cla…
140
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use the accompanying radiation levels (in w/kg) for 50 different cell p…
14
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one option in a roulette game is to bet $6 on red. (there are 18 red co…
a. -$0.32$ b. B. This value represents the expected loss over the long run for each game played.
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express the following probability as a simplified fraction and as a dec…
The probability as a simplified fraction is $\frac{7}{120}$. The probability as a decimal is approximately $0.058$.
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the numbered disks shown are placed in a box and one disk is selected a…
$\frac{1}{4}$
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(c) consider the experiment described in part (a). describe how you wou…
First, assign individuals to the three blocks based on age. Second, assign individuals to the three blocks based on age. Last, compute percentages of donors in each group for each…
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consider a political discussion group consisting of 4 democrats, 7 repu…
$\frac{1}{78}$
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a single die is rolled twice. find the probability of rolling a 3 the f…
$\frac{1}{36}$
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a radio talk show host asked listeners to respond either yes or no to t…
1. all listeners of the radio talk show 2. opinion of a listener 3. Yes, voluntary response. Those with the strongest opinions are most likely to call in.
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(c) what is the variable for question a? type of job number of students…
What is the variable for question A?: type of job Classify the variable as qualitative or quantitative.: qualitative What is the level of measurement?: nominal
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use the percentiles flowchart interactive to answer the following quest…
C. The IQ score that is midway between the 70th and 71st scores in the sorted list.
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(f) suppose only 46% of the students you selected for the sample respon…
54 Yes, the people choosing not to respond may have some characteristics that would bias the study. No, the sample frame is restricted to one campus.
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which of the following is not a value in the 5 - number summary? choose…
D. Mean
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(d) what is the variable for question b? rating of satisfaction of work…
- rating of applicability of work experience to future employment - qualitative - ordinal - statistic
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fill in the blank. whenever a data value is less than the mean, _______…
the corresponding z - score is negative
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(c) what is the variable for question a? o type of job o number of stud…
type of job qualitative nominal
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fill in the blank. a data value is considered ________ if its z - score…
significantly low or significantly high
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the following are the tolls of men by women in an experiment including …
30, 57.5, 65, 90, 100
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listed below are blood groups of o, a, b, and ab of randomly selected b…
| Blood Group | Relative Frequency | | ---- | ---- | | O | 46.7% | | A | 40% | | B | 10% | | AB | 3.3% |
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use z scores to compare the given values. in a recent awards ceremony, …
Since the z - score for the winner of Best Actor is $z=-1.66$ and the z - score for the winner of Best Actress is $z = 1.02$, the winner of Best Actor had the more extreme age.
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in a particular class, exams are worth 50% of the overall grade, quizze…
$81.3$
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6. how does the description of the storm and fading colors add layers o…
6. The descriptions create mood, symbolize character states, and may foreshadow events, adding atmosphere and depth. 7. He may be rational - minded or outgrowing childhood fears, …
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find the weighted average of these values. value weight 3.00 75.0% 4.00…
$3.35$
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researchers measured the data speeds for a particular smartphone carrie…
a. $53.06$ b. $\frac{53.06}{20.17}\approx2.63$ c. $\frac{71.5 - 18.44}{20.17}\approx2.63$ d. Yes, since the z - score ($\approx2.63$) is greater than 2, the carrier's highest data…
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if your score on your next statistics test is converted to a z - score,…
A. The z score of 2.00 is most preferable because it is 2.00 standard deviations above the mean and would correspond to the highest of the five different possible test scores.
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the boxplots shown below represent customer waiting times (minutes) for…
fewer customers have to wait a significantly longer time
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the boxplots shown below represent customer waiting times (minutes) for…
much less variation
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the boxplots shown below represent customer waiting times (minutes) for…
The waiting line represented by the bottom boxplot is better because the times have a smaller inter - quartile range so the waiting times are more consistent and generally lower.
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the boxplots shown below represent customer waiting times (minutes) for…
The waiting line represented by the bottom boxplot is better because the times have less variability so customers can expect more consistent waiting times.
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for the following description of data, identify the ws, name the variab…
1. C. Car manufacturers 2. B. horsepower, C. the manufacturer, D. vehicle type, E. weight, G. city gas mileage, H. highway gas mileage
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chunk 5 - paragraphs 32–37 12. why is the idea of being erased from exi…
12. Being erased means total negation of identity and all traces, while disappearing may leave some remnants. 13. Varies based on text clues like others' forgetfulness, vanishing …
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a successful basketball player has a height of 6 feet 4 inches, or 193 …
2.66
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the data in the table represent the height of an object over time. heig…
quadratic, because the height increases and then decreases
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for the following description of data, identify the ws, name the variab…
C. Car manufacturers
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identify the sampling techniques used, and discuss potential sources of…
What type of sampling is used? C. Cluster sampling is used, since the disaster area is divided into grids, and some of those grids are selected and everyone in those grids is inte…
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fill in the blank. the square of the standard deviation is called the _…
variance
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fill in the blank. for data sets having a distribution that is approxim…
the Empirical Rule
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fill in the blank. the range rule of thumb roughly estimates the standa…
s = $\frac{range}{4}$
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4. the formula for the volume of a rectangular solid is v = lwh where l…
4. $\frac{V}{l}=wh$, $\frac{V}{wl}=h$, $\frac{V}{h}=lw$ 5. C. the rate the price of a gallon of milk increases each year.
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which measure of variation is most sensitive to extreme values? choose …
D. Range
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the body - temperatures of a group of healthy adults have a bell - shap…
a. 99.7 b. 95
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use the body temperatures, in degrees fahrenheit, listed in the accompa…
does not meet
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use the body temperatures, in degrees fahrenheit, listed in the accompa…
The estimated standard deviation is more than $0.2^{\circ}$ greater than the actual standard deviation. Thus, the estimated standard deviation does not meet the goal.
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use the body temperatures, in degrees fahrenheit, listed in the accompa…
$0.95$
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use software or a calculator to find the range, variance, and standard …
$0.48$
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use software or a calculator to find the range, variance, and standard …
$0.79$
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in 1965, researchers used random digit dialing to call 1100 people and …
1. C. Simple random sampling was used, since each number had an equal chance of being dialed, so all samples of 1100 phone numbers had an equal chance of being selected 2. B. Indi…
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which sentences from frederick douglasss speech, what to the slave is t…
The fact is, ladies and gentlemen, the distance between this platform and the slave plantation, from which I escaped, is considerable — and the difficulties to be overcome in gett…
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use software or a calculator to find the range, variance, and standard …
$0.69$
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use software or a calculator to find the range, variance, and standard …
Since the data in the table is not in a clean copy - pastable format, we cannot calculate the exact standard deviation. But the process to calculate it is as above. If you provide…
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type the correct answer in each box. use numerals instead of words. if …
In the table, from top - to - bottom, the blanks are: B - M, B - C, B - R; 16
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a recent newspaper article reported on americans eating habits. the art…
B. The variable is quantitative because a percentage, 26%, is being recorded and this is a numeric measurement.
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jessica has three sport cards, one for football (f), one for baseball (…
C. 9
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a recent newspaper article reported on americans eating habits. the art…
C. The variable is quantitative because a percentage, 26%, is being recorded and this is a numeric measurement.
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listed below are the amounts (dollars) it costs for marriage proposal p…
The range of the sample data is 2462 dollars. The standard deviation of the sample data is 717.8 dollars. The variance of the sample data is 515236.8 dollars$^{2}$. C. Yes, the la…
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a may 2020 gallup poll asked, do you think marriages between same - sex…
A. This response variable would be classified as a categorical variable because the variable options use words and not numerical values
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select the correct answer from each drop - down menu. the table shows t…
1. First, find the average height of buildings in San Francisco: - The sum of the heights of the 10 tallest buildings in San Francisco is \(260 + 237+212 + 197+184+183+183+175+174…
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steve and karla are studying the text - messaging habits of middle scho…
1. First, recall the formula for the inter - quartile range (IQR): $IQR = Q_3 - Q_1$, where $Q_1$ is the first quartile and $Q_3$ is the third quartile. - Assume from the box - pl…
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which sociological perspective emphasizes the distribution of power and…
B. conflict perspective
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rick wants to know the height of the students in seventh - grade. he ra…
C. On average, the students are 56 inches tall; D. About one - half of the students are more than 46 inches tall
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select the correct answer from each drop - down menu. rae and doris are…
The median of Rae's data is 2.22 minutes, and the median of Doris' data is 2.14 minutes. The interquartile range for Rae is 0.3, and the interquartile range for Doris is 0.19. The…
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listed below are the amounts (dollars) it costs for marriage proposal p…
2462 dollars