Estadística
Análisis de datos, distribuciones de probabilidad y pruebas de hipótesis.
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standard deviation : tells you how far each score is from the mean. \hi…
Approximately 28.94
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how yale womens crew leveled the playing field in 1976, the highly succ…
In order to secure fair access to showers, the Yale women's crew team called attention to Title IX in an unusual way.
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describing science, technology, engineering, and mathematics pay how do…
It is far higher than the overall median.
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calculate joshuas mean length of utterance (mlu) at the age of 35 month…
5
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what is the meaning of elastic as used in the text? clear or see - thro…
stretchy and bouncy
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calculate sarahs mean length of utterance (mlu) at the age of 30 months…
$3.75$
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the mean length of utterance (mlu): is a good predictor of childrens gr…
The Mean Length of Utterance (MLU) is a good predictor of children's grammatical abilities.
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what is the meaning of summit as used in the text? beautiful spot highe…
highest point
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32. performance task write a statistical question about teenagers at yo…
2500
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32. performance task write a statistical question about teenagers at yo…
2500
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what is the meaning of miniature as used in the text? smaller than usua…
smaller than usual
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2 select the correct answer. which of these sentences from the short st…
C. It is so hard to talk to John about my case, because he is so wise, and because he loves me so.
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based on the text, in which two ways are today’s new marbles different …
Most modern marbles are meant for children instead of for adults. Most modern marbles are made by machine instead of by hand.
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31. problem solving to estimate the margin of error when the standard d…
a. about $\pm0.492$ b. The interval is between $52 - 0.492=51.508$ and $52 + 0.492 = 52.492$ 1. $51.508$ 2. $52.492$
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30. thought provoking consider a large population of which p percent (i…
The sample size needed is maximized when \(p = 0.5\). When \(p\) is close to \(0\) or \(1\), the sample size needed is relatively small. When \(p\) is around \(0.5\), the sample s…
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help you know what birds youre seeing. some bird - watchers als to reco…
something to do for fun
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read paragraph 9 of the story. then answer the multiple - choice questi…
B. with great passion
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calculate sarahs mean length of utterance (mlu) at the age of 30 months…
3.75
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calculate joshuas mean length of utterance (mlu) at the age of 35 month…
4.8
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directions: for the following questions, choose the best answer or resp…
1. C. certain something bad will happen. 2. A. Even if something is cruel, people have the tendency to follow the crowd and participate. 3. D. He represents the fear of change and…
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the boxplot below displays the arm spans for 44 students. which of the …
143, 162, 168, 180, 202
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in some gymnastics meets, the score given to a gymnast is the mean of t…
Her score is lower after removing the highest and lowest scores.
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the box plots represent the distributions of typing speeds of students …
The range of the speeds after the course is smaller than the range of the speeds before the course.
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the heights of a sample of 15 students are recorded in the stemplot bel…
66
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a box of led light bulbs was tested to see how long the light bulbs las…
The lifetime of the light bulbs typically varies by about five years from the mean.
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thirty - six students at a large university were given a test to measur…
105 - 108
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détente means increased openness. restructuring. reform. a relaxing of …
D. a relaxing of tensions
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the histogram represents the distributions of essay scores for high sch…
The juniors tended to have higher essay scores than the sophomores. The interquartile range is the best comparison of the measure of variability.
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data were collected from a typing class with 45 students. the class had…
The standard deviation would be about the same, perhaps a little smaller.
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2÷\\frac{1}{5} what does this division expression mean? how many are in…
How many $\frac{1}{5}$s are in 2?
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the distribution of the salaries at a small business is strongly skewed…
The median is better because it is not affected by the high salaries.
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29. problem solving a survey reported that 47% of the voters surveyed, …
1. 500 voters 2. about $\pm4.5\%$ 3. Candidate A: between $42.5\%$ and $51.5\%$ 4. Candidate B: between $48.5\%$ and $57.5\%$ 5. No
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the box plots show the data distributions for the number of text messag…
2
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iq scores are collected from a sample of students at a large university…
104
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what does this division expression mean? how many are in? 1/3 s 1/7 s 3…
The division expression "How many $\frac{1}{3}$ are in 3" or "How many $\frac{1}{7}$ are in 4" (two possible interpretations based on the given numbers and the division - meaning …
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without making any calculations, which data set has the smallest standa…
1, 1, 1, 1, 2, 2, 2, 2
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the five - number summary for the lengths of songs, in minutes, perform…
1.2
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27. making an argument your friend says that a margin of error can be a…
No
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the parallel boxplots below display the quiz grades (out of 30) for two…
The distribution of quiz grades for class 1 appears to be skewed right, and the distribution of quiz grades for class 2 appears to be fairly symmetric.
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9. the best type of graph to use to show the percentages of a whole is …
B. Circle Graph
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the boxplot below displays the arm spans for 44 students. the five - nu…
Approximately 25% of the arm spans are less than 180 cm.
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thirteen students in a statistics class were asked how many siblings th…
0, 2.5, 3, 4, 6
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joe is interested in the prices of homes sold in his area. he found a l…
The mean is greater than the median.
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a 10 - item statistics quiz was given to 30 students. the table below g…
8.5
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a research study was conducted to measure the time students focused on …
median
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as an introduction to probability, a student is asked to roll a fair, s…
5
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the parallel dotplots below display the number of cars parked for sever…
None of the given statements are true.
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27. making an argument your friend says that a margin of error can be a…
1. No 2. The expression is \(4n\) 3. The sample size must be increased 4 times to cut the margin of error in half.
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25. error analysis in a random sample of 2500 consumers, 61% prefer gam…
For 25: The error was using the wrong margin - of - error formula. The correct interval is between $59.09\%$ and $62.91\%$. For 26: The error was using the wrong margin - of - err…
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24. how do you see it? the figure shows the distribution of the sample …
Simulation A has the least margin of error and simulation C has the greatest margin of error because simulation A has the smallest standard deviation and simulation C has the larg…
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the stemplot below displays the times, in seconds, for 25 students to r…
22, 24.5, 26, 28, 30
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the table shows the number of pages in the books in box a and the numbe…
The median of Box B is greater than the median of Box A.
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which best explains how the histogram is useful for comparing the shape…
It is easier to visually compare symmetry and skew of the data.
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24. how do you see it? the figure shows the distribution of the sample …
Simulation a has the least margin of error and simulation c has the greatest. This is true because simulation a has the smallest standard deviation and simulation c has the larges…
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a statistics student gave a survey to students which asked how many fir…
2.52 first cousins
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22. college prep a survey claims that 32% of u.s. adults think that mor…
22. 28% - 36% 23. 321
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ms. barnsley separates her class into two groups. she gives each studen…
The median of Group A is greater than the median of Group B.
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a simple random sample of 10 people was asked how many first cousins th…
$11.5$
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number of days temperature (°f) which comparison of the distributions i…
The distribution of low temperatures is skewed right, and the distribution of high temperatures is nearly symmetric.
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21. repeated reasoning what happens to the margin of error as a sample …
Decreases
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the five - number summary of a data set is given below. minimum: 3 q1: …
The distribution's minimum is an outlier.
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the parallel dotplots below display the number of absences for students…
The range for the distribution of the number of absences is larger for class C.
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19. modeling real life in a survey of 920 u.s. teenagers, 81% said that…
19. The interval is between $77.7\%$ and $84.3\%$. 20. The interval is between $67.8\%$ and $72.2\%$. 21. The margin of error decreases.
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the resting heart rates for a sample of 15 students are recorded in the…
69.9 beats per minute
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data were collected from a typing class with 10 students. the class had…
The standard deviation would be noticeably larger.
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the scores for 21 students on an exam are summarized in the stemplot be…
The mean will increase but the median will be unchanged.
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16. find the margin of error for a survey that has a sample size of 640…
16. about $\pm1.3\%$ 17. about $\pm1.8\%$ 18. about $\pm3.7\%$
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what is true about the variability of the prices of socks in kid sizes …
There is more variability in the prices of kid socks because they have a greater range.
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assume that human body temperatures are normally distributed with a mea…
a. $0.01$ b. $99.23^{\circ}F$
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the histogram represents the distributions of boiling temperatures, in …
The two distributions are each nearly symmetric.
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the table shows the test scores of students who studied for a test as a…
Both distributions are nearly symmetric, so the mean and the standard deviation are the best measures for comparison.
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engineers want to design seats in commercial aircraft so that they are …
$16.7$
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the box plots show the data distributions for the number of customers w…
4
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money received for work is/are ______. wages income taxxes mean salary
A. wages
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the table shows the battery lives, in hours, of ten brand a batteries a…
Both distributions are skewed left, so the interquartile range is the best measure to compare variability.
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scores on a test are normally distributed with a mean of 63.2 and a sta…
D. 73.47
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find the indicated iq score. the graph to the right depicts iq scores o…
114
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which measure of center is the best to use to compare the prices of kid…
C. median
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use the data in the following table to answer the questions below. dail…
B. $20$
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use the data in the following table to answer the questions below. dail…
$23.50$
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college high school 0 2 4 6 8 10 12 14 16 18 20 22 24 which statements …
The median attention span of college students is greater than the median attention span of high school students; The range of attention span of college students is greater than th…
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the box plots represent the ages of pennies in two 50 - cent rolls. by …
She may not be correct because means cannot be determined from the box plots.
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use the data in the following table to answer the questions below. dail…
$23$
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assume that adults have iq scores that are normally distributed with a …
$0.6046$
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assume that adults have iq scores that are normally distributed with a …
0.0446
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essay contest scores number of students essay score (out of 8) which co…
The distribution of sophomores' scores is right - skewed, and the distribution of juniors' scores is left - skewed.
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for the last five days, brian spent the following amounts for lunch: $5…
$4.15$
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2. \the counselor, luke, came over. he had the hermes family resemblanc…
scar
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the number of goals the blue jay hockey team scored in each game last y…
D. 3
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a banks loan officer rates applicants for credit. the ratings are norma…
B. 0.4332
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the daily low temperatures(f°) for the past week are: 62°, 58°, 55°, 65…
C. $62^{\circ}$
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the daily low temperatures(f°) for the past week are: 62°, 58°, 55°, 65…
$62^{\circ}$
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find the area of the shaded region. the graph to the right depicts iq s…
$0.8577$
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2. based on the context clues, which synonym best matches the meaning o…
A. carefully
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watch the video and answer the question listed below. if the underlying…
C. Normal
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what does the notation $z_{alpha}$ indicate? the expression $z_{alpha}$…
to the right of it under the standard - normal curve.
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how did the emancipation proclamation change the meaning of the civil w…
The goal of the war changed from saving the Union to saving the Union and eliminating slavery.
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assume that a randomly selected subject is given a bone density test. b…
A.
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find the indicated z score. the graph depicts the standard normal distr…
\(-1.31\)
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assume that a randomly selected subject is given a bone density test. t…
B. The graph with the area between \(z=-1.57\) and \(z = 1.57\) shaded; Probability is \(0.8836\)