Test Content
1
.
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Complete the quiz to test your knowledge
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2.
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You are asked to conduct a study of shelters for women who have experienced domestic violence to determine the necessary capacity in your city to provide housing for most of these women. After recording data for a whole year, you find that the mean number of women in shelters each night is
250
, with a standard deviation of
75
. Fortunately, the distribution of the number of women in shelters each night is normal, so you can answer the following questions posed by the city council.
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3.
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Question 1
2 Points
If the city’s shelters have a capacity of 350, will that be enough places for abused women on 95% of all nights?
1.
Yes
2.
No
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4.
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Question 2
2 Points
What number of shelter openings will be needed?
1.
250
2.
370
3.
75
4.
374
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5.
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Question 3
2 Points
The current capacity is only 220 openings because some of the shelters have been closed. What is the percentage of nights that the number of abused women seeking shelter will exceed current capacity?
1.
62.21%
2.
65.54%
3.
34.46%
4.
40%
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6.
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A criminologist developed a test to measure recidivism, where low scores indicated a lower probability of repeating the undesirable behavior. The test is normed so that it has a mean of
140
and a standard deviation of 40.
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7.
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Question 4
2 Points
What is the percentile rank of a score of 172?
1.
78.81st percentile
2.
80th percentile
3.
40th percentile
4.
28.81th percentile
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8.
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Question 5
2 Points
What is the z-score for a test score of 200?
1.
–
1.50
2.
0.5
3.
1
4.
1.50
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Question 6
2 Points
What percentage of scores falls between 100 and 160?
1.
28.81%
2.
53.28%
3.
19.15%
4.
34.13%
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Question 7
2 Points
What proportion of respondents should score above 190?
1.
0.5
2.
1
3.
1.50
4.
1.25
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Question 8
1.5 Points
Suppose an individual is in the 67th percentile in this test. What is his or her corresponding recidivism score?
1.
155.9
2.
140
3.
157.6
4.
112.9
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According to National Collegiate Athletic Association (NCAA) data, the means and standard deviations of eligibility and retention rates (based on a 1,000-point scale) for the 2013–2014 academic year are presented, along with the fictional scores for two basketball teams, A and B. Assume that rates are normally distributed.
Normal Distribution Practice data
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Question 9
1.5 Points
On which criterion (eligibility or retention) did Team A do better than Team B? Calculate appropriate statistics to answer this question.
1.
Team A has better retention and eligibility than Team B.
2.
Team B has better retention and eligibility than Team A.
3.
Team B has better retention but Team A has better eligibility.
4.
Team A has better retention but Team B has better eligibility.
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Question 10
1.5 Points
What proportion of the teams have retention rates below Team B?
1.
43.25
2.
4.325
3.
0.4325
4.
0.04325
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Question 11
1.5 Points
What is the percentile rank of Team A’s eligibility rate?
1.
43.25th percentile
2.
36.54th percentile
3.
35.94th percentile
4.
17th percentile
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