統計與機率
資料分析、機率分佈、假設檢定與統計方法。
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a grocer thought her eggs needed safer packaging. she counted the numbe…
Shape: skewed to the left Center: 11.5 Spread: 6 Outliers: 0
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before applying to law school in the us, students need to take an exam …
Juwan scored relatively better on the LSAT.
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she counted the number of intact eggs in 24 cartons from the cooler. th…
The distribution of intact eggs is skewed left. The center of the distribution is around 12 intact eggs. The spread of the data is relatively small, ranging from 6 to 12 intact eg…
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freya recorded the daily high temperature in her city every day for two…
Center
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the dot plot shows the number of days from hatching until their first f…
Approximately 33rd percentile.
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the dot - plot shows the weights, to the nearest quarter kilogram, of 2…
Shape: Symmetric Center: 3.25 Spread: 1.5 Outliers: None
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an auto repair shop records how far each vehicle they receive has been …
$200 - 250$ (thousands of kilometers)
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the histogram below shows the distribution of heights (in meters) for t…
Shape: The distribution of heights is skewed to the right. Center: The median is somewhere between 240 and 290 meters. Spread: The range is approximately 260 meters.
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the following dot plot shows the number of songs on each of the 19 albu…
C. \(84^{\text{th}}\) percentile
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use excel to find the requested percentiles for the following data set.…
a) The value obtained from the `=PERCENTILE.EXC(A1:A32, 0.25)` formula. b) The value obtained from the `=PERCENTILE.EXC(A1:A32, 0.35)` formula. c) The value obtained from the `=PE…
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a set of bicycle prices are normally distributed with a mean of 300 dol…
$0.9452$
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use the formula for finding the kth percentile from the openstax text, …
$i = 0.97n$ (where $n$ is the total number of data points) For the value of $P_{97}$, without more information from the histogram (such as class - intervals, frequencies, and cumu…
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a set of high school student heights are normally distributed with a me…
$0.0228$
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which sales channel has been opened to manufacturers because of digital…
B. Direct - to - Consumer
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a set of elementary school student heights are normally distributed wit…
$0.0721$
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question 21 suppose you take a standardized test and you are in the 11t…
1. D. 11% of the scores were your score or lower 2. A. It depends on how the rest of the class scored. If scores were really low on this exam, it is possible that I got a passing …
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a set of sofa prices are normally distributed with a mean of 2500 dolla…
$0.6736$
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question 20 calculate the 30th percentile of the data shown x 2.3 3.5 5…
$9.65$
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some of the students at syracuse junior high school work as volunteers …
Min: 8 Q1: 10 Med: 10.5 Q3: 12 Max: 17 IQR: 2 Lower fence: 7 Upper fence: 15 Outlier(s): Jewel
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practice 2b score: 21.99/46 answered: 16/23 question 17 based on the bo…
5, 11, 13, 16, 18
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the five number summary of a dataset was found to be: 0, 3, 8, 17, 19. …
An observation is considered an outlier if it is below: - 18 An observation is considered an outlier if it is above: 38
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practice 2b score: 17.99/46 answered: 14/23 question 15 find the 5 numb…
14, 40.75, 69, 89, 98
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which are two characteristics of direct distribution that differ from f…
1. Direct distribution is also known as a zero level channel. 2. The manufacturer controls all aspects of distribution.
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russell has surveyed their 30 classmates about the number of pets in th…
| Number of pets | Frequency | Relative Frequency | | ---- | ---- | ---- | | 0 | 2 | 0.0667 | | 1 | 7 | 0.2333 | | 2 | 7 | 0.2333 | | 3 | 3 | 0.1000 | | 4 | 4 | 0.1333 | | 5 | 3 |…
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quiz 2: to kill a mockingbird, part 1 which of the following statements…
B. Scout did not mean to insult Walter Cunningham, she just did not understand that what she was saying was offensive.
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means being able to evaluate information in order to judge whether it i…
Discerning
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this test statistic leads to a decision to... reject the null accept th…
First part: reject the null Second part: There is sufficient evidence to support the claim that the first population mean is less than the second population mean.
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practice 2b score: 13.99/46 answered: 11/23 question 12 ages number of …
$18.2$
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data was collected for 40 randomly selected honey bee hives on a farm. …
25
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which statement best describes the great society programs? o many of th…
Many of them are still in effect today.
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suppose the linear regression line y = 3.009x - 77.131 predicts a pizza…
D. $750$
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in june of 2020, a study was performed to determine the extent to which…
a. $H_0:p\leq0.12$ b. $H_1:p > 0.12$ c. Alternative hypothesis d. $z\approx2.31$ e. $p - value\approx0.0104$ f. Reject the null hypothesis g. Using a 5% level of significance, the…
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a set of data points has a line of best fit of y = 2.5x - 1.5. what is …
D. 1
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c. enter the alternative hypothesis. $h_1:p\ eq0.33$ d. is the original…
g. Fail to reject the null hypothesis h. Using a 5% level of significance, there is not sufficient evidence to reject the claim that the percentage of people who take Tamiflu for …
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a data set consists of the following data points: (3,5),(5,8),(6,13) th…
D. 4.5
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a doctor is concerned that nausea may be a side - effect of tamiflu, bu…
a. One - proportion z - test b. $H_0:p = 0.33$ c. $H_1:p eq0.33$ d. Null hypothesis e. $z\approx - 1.86$ f. $p - value\approx0.0628$
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what is the equation of the line of best fit for the following data? ro…
A. $y = 0.894x+0.535$
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1. multiple choice: what is the best meaning of the word \proclivity\ a…
C. natural ability
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question 49 (2 points) what is a characteristic of a transformational m…
Question 49: engaging in developmental consideration of others Question 50: charismatic
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this road sign means: a one way traffic in the direction of the arrow. …
D. Wait for the signal to turn green before you turn.
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question 47 (2 points) which theory alerts managers that sometimes they…
Question 47: the leader substitutes model Question 48: Explain to the workers how their jobs are critical to the company's success.
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using a 5% significance level. a. what type of test will be used in thi…
a. One - proportion z - test b. $H_0:p = 0.5$ c. $H_1:p>0.5$ d. Alternative hypothesis e. Cannot be calculated without sample statistics f. Cannot be calculated without test - sta…
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the iq scores of 50 students are given below. 97 112 99 118 118 101 93 …
| Class | Frequency | | ---- | ---- | | 85 - 89 | 5 | | 90 - 94 | 7 | | 95 - 99 | 6 | | 100 - 104 | 6 | | 105 - 109 | 2 | | 110 - 114 | 8 | | 115 - 119 | 12 |
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during one shift, the express lane clerk recorded how many times custom…
13
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data was collected for a sample of lemonade brands. the amount of sugar…
a. $n = 31$ b. relative frequency $\approx0.26$
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here is a data set: the goal is to construct a grouped frequency distri…
optimal class width = 25 1st lower class limit = 225
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a college administrator claims that 78% of college students purchase th…
a. One - proportion z - test b. $H_0:p = 0.78$ c. $H_1:p eq0.78$ d. Null hypothesis e. Approximately $2.53$ f. Approximately $0.0114$ g. Reject the null hypothesis
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complete the frequency distribution for the data. age frequency 20 - 29…
| Age | Frequency | | ---- | ---- | | 20 - 29 | 2 | | 30 - 39 | 5 | | 40 - 49 | 1 | | 50 - 59 | 9 | | 60 - 69 | 5 | | 70 - 79 | 3 | | 80 - 89 | 1 |
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odiar means _____. o to bury o to shove o to yell o to hate
to hate
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a college administrator claims that 78% of college students purchase th…
a. One - proportion z - test b. $H_0:p = 0.78$ c. $H_1:p eq0.78$ d. Null hypothesis e. Approximately 2.53 f. 0.0114 g. Reject the null hypothesis
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true/false: muerto means \lost.\ true false
False
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32 multiple - choice 2 points the process of creating long - lasting me…
32. consolidation 33. chunking
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which word means \your brothers wife?\ padre tia cuñada hermano
C. cuñada
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the goal is to construct a grouped frequency distribution table (gfdt) …
min = (Value of minimum of the data - set, not given) minimum $\div$ class width=$\frac{x_{min}}{0.25}$ This number rounds down to $\lfloor\frac{x_{min}}{0.25} floor$ 1st lower cl…
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here is a data set: 22.9 48 43.7 35.5 15.3 8.8 22.1 25.8 9 38.2 20.8 21…
range = $43.1$ optimal class width = $5$
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what were the 95 theses, and who wrote them? what does reform or reform…
1. Los 95 Tesis fueron escritas por Martín Lutero. 2. La Reforma o Reforma - ción implicó la creación de iglesias protestantes y la crítica a prácticas de la Iglesia Católica. 3. …
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ages number of students 15 - 18 2 19 - 22 4 23 - 26 8 27 - 30 9 31 - 34…
Lower class limit
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the placebo effect means ______ - experiment bias causes the subjects t…
1. the expectations of the participants influence their behavior 2. spurious relationship 3. the cocktail party effect
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question 33 (2 points) lamar works for a distribution center. he has be…
Question 33: B. legitimate Question 34: B. reward
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46 multiple - choice 2 points __________ is the activation of receptors…
46. C. sensation 47. C. the scientific method
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in a sample of 173 employees, you find that 8% of them take public tran…
a. One - proportion z - test b. $H_0:p = 0.08$ c. $H_1:p eq0.08$ d. Null hypothesis e. Cannot be calculated without sample size and sample proportion f. Cannot be calculated with…
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22 multiple choice 2 points a perfect correlation, whether positive or …
22. C. rare 23. B. perception
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test statistic = 0.28 what is the p - value for this sample? (report an…
The p - value is greater than $\alpha$. This test statistic leads to a decision to fail to reject the null. As such, the final conclusion is that there is not sufficient evidence …
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question what does humanism mean? what is perspective in renaissance ar…
Humanismo en el arte renacentista: celebración del individuo y su potencial. Perspectiva en arte renacentista: crea ilusión de profundidad. Patrón: individuo o institución que fin…
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you are conducting a study to see if the proportion of voters who prefe…
test statistic = 0.28 p - value = 0.6103 The p - value is greater than $\alpha$ This test statistic leads to a decision to fail to reject the null
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quiz 1: reading, fluency, and language strategies readers who think cri…
True
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a. what type of test will be used in this problem? a test for the mean …
0.70
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what is the equation of the line of best fit for the following data? ro…
A. \(y = 0.894x + 0.535\)
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the data below represents yearly car insurance premiums in the us for 9…
a. One - sample t - test b. \(H_0:\mu = 1576\), \(H_a:\mu eq1576\) c. Null hypothesis d. \(0.39\)
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quiz 1: reading, fluency, and language strategies students can better d…
D. All of the choices are correct
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a calculator was used to perform a linear regression on the values in t…
A. $y=-3.6x + 12.8$
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b. identify the null and alternative hypotheses? $h_0: mu = 1.5777$ $h_…
d. Insufficient data to calculate e. Insufficient data to calculate
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candlelight books kept a record of how its sales increased based on dis…
D. As the discount increases by 1%, the sales increase by 3%.
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4. schools use this to review if you are meeting the requirements to re…
D. SAP
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the work week for adults in the us that work full time is normally dist…
We fail to reject the null hypothesis.
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measure the height of a plant (in inches) over time (in days). the resi…
B. Data set B
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multiple - choice question what type of graph best shows data collected…
B. Line graph
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what does it mean to say that a data point has a residual of 0? a. the …
A. The point lies directly on the regression line.
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a. what type of test will be used in this problem? (a test for the mean…
0.0192
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a. what type of test will be used in this problem? a test for the mean …
a. A test for the mean using the t - distribution (t - test) b. $H_0:\mu\leq891$, $H_a:\mu > 891$ c. Alternative Hypothesis d. 2.87
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choose the property that justifies the statement below. if 3(x + 5) = 1…
Distribution
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in tests of a computer component, it is found that the mean time betwee…
a. One - sample t - test b. \(H_0:\mu\leq891\), \(H_a:\mu > 891\) c. Alternative hypothesis d. \(2.87\)
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suppose the correlation coefficient between a babys weight and the numb…
C. As the baby gains weight, the number of coffee shops tends to increase.
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which of these is not a possible r - value? a. 0.2 b. 1.75 c. -0.1 d. -…
B. 1.75
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george bought a broken bicycle. he repaired it and sold it for $85. thi…
George paid $32.50$ for the broken bicycle.
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which of these r - values represents the weakest correlation? a. 0.4 b.…
B. 0.2
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question 7 of 10 use a calculator to find the r - value of these data. …
D. -0.985
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a little brown bat has eaten 1,400 mosquitoes. it can eat 900 mosquitoe…
It would take the bat 3 hours to eat 4,100 mosquitoes.
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heights, in inches, for the 200 graduating seniors from washington high…
D. It is greater than or equal to 60 inches but less than 66 inches.
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martin is selling chocolate bars for a fundraiser. his goal is to sell …
Martin needs to sell for 22 more hours to meet his goal for the fundraiser.
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marie is reading a 271 - page book. she has already read 119 pages. she…
It will take Marie 19 hours to finish the book.
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what must all graphs have? (multiselect) grids title axis labels bars e…
B. Title, C. Axis Labels
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which of the following graphs shows a negative linear relationship with…
B. Graph B
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leo sold candy bars for a fundraiser. he spent $25 on a box of candy ba…
Leo sold 47 candy bars for the fundraiser.
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pregunta 17 (5 puntos) using a tool such as an online career planning w…
# Breve Explicación: Las herramientas de planificación profesional en línea ayudan a identificar fortalezas y debilidades, crean portafolios con resultados de evaluaciones y permi…
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the graph shows the volume of ice cubes versus temperature in degrees c…
B. The correlation coefficient is close to zero.
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mostrar instrucciones pregunta 17 (5 puntos) using a tool such as an on…
# Brief Explanations: Un sitio web de planificación profesional te permite identificar tus fortalezas y debilidades, lo cual es esencial para construir un portafolio en[SSE Comple…
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consider the graphs below. what are the explanatory variables? a. tempe…
C. Height, Time, Width
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what is the value of the discriminant, $b^{2}-4ac$, for the quadratic e…
The discriminant is -4, so the equation has no real solutions.
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for a project, helen found out how often people played miniature golf l…
$2.9375$