Big AP Stats Review

Quiz
•
Mathematics
•
12th Grade
•
Hard
Anthony Clark
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
An SRS of 100 teachers showed that 64 owned smartphones. An SRS of 100 students showed that 80 owned smartphones. Let pₑ be the proportion of all teachers who own smartphones, and let pₓ be the proportion of all students who own smartphones. A 95% confidence interval for the difference pₑ - pₓ is
(0.264, 0.056)
(0.098, 0.222)
(-0.222, -0.098)
(-0.283, -0.038)
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
If P(A) = 0.24 and P(B) = 0.52 and A and B are independent, what is P(A or B)?
0.1248
0.28
0.6352
0.76
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In your top dresser drawer are 6 blue socks and 10 grey socks, unpaired and mixed up. One dark morning you pull two socks from the drawer (without replacement, of course!) What is the probability that the two socks match?
0.075
0.375
0.450
0.500
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A simple random sample of 1000 Americans found that 62% were satisfied with the service provided by the dealer from which they bought their car. A simple random sample of 1000 Canadians found that 59% were satisfied with the service provided by the dealer from which they bought their car. The sampling variability associated with these statistics is
exactly the same
not exactly the same, but very close
much smaller for the sample of Canadians because the population of Canad is much smaller than that of the United States, hence the sample is a larger proportion of the population.
smaller for the sample of Canadians because the percent satisfied was smaller than that of Americans.
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following is the best estimate of the standard deviation of the distribution in the figure?
18
9
54
97
106
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A company determines the mean and standard deviation of the employees' salaries in one year. What is the best description of the standard deviation?
Approximately the median distance between the individual salaries of employees and the mean of every employee's salary.
The amount of money separating the highest salary from the lowest salary when considering the middle 50% of the distribution.
The amount of money separating the highest salary from the lowest salary when considering all employees.
The distance between the salary of an employee and the mean salary of all the employees.
Approximately the mean distance between the individual salaries of employees and the mean of all employees' salaries.
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The heights of adult women are approximately normally distributed about a mean of 65 inches with a standard deviation of 2 inches. If Bella is at the 87th percentile in height for adult women, then her height, in inches, is closest to
63
67
66
72
70
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