AP Statistics Semester 1 Review (TPS2e)

Question 1

P(A) = 0.60, P(B) = 0.20, and P(A and B) = 0.10. What is P(A or B)?

Accepted Answer

0.70

Question 2

Which of these measurements is resistant to outliers?

Accepted Answer

median

Question 3

What kind of bias is taking place here?

Accepted Answer

response bias

Question 4

Give the z-score for the 3rd quartile of a standard normal distribution.

Accepted Answer

0.67

Question 5

The distribution shown can be best described as which of the following?

Accepted Answer

right skewed

Question 6

Mean test grade = 70 with S.D. = 10. Find mean and S.D. if all test grades are doubled.

Accepted Answer

mean = 140, S.D. = 20

Question 7

What is the IQR for this ogive?

Accepted Answer

17

Question 8

Which of the following statements is correct about this histogram?

Accepted Answer

mean > median

Question 9

P(A) = 0.60, P(B) = 0.20, and A and B are independent. What is P(A or B)?

Accepted Answer

0.68

Question 10

A line is fit to data for the years 1990-2000. Using this to predict a 2015 value is

Accepted Answer

extrapolation

Question 11

Where did I go to college? And grad school too???

Accepted Answer

NC State

Question 12

On the scatterplot, which point would be considered an outlier?

Accepted Answer

9 (BLS)

Question 13

Find the probability of rolling at least 3 "ones" if rolling 5 times. Use binomcdf(n, p, x)

Accepted Answer

1-binomcdf(5,1/6,2)

Question 14

A basketball player makes 80% of her shots. Find the mean number of makes if n = 10.

Accepted Answer

10 x 0.80

Question 15

Find probability of getting at least 1 tail when flipping 3 fair coins.

Accepted Answer

7/8

Question 16

What is the expected value of the discrete random variable x?

Accepted Answer

2.65

Question 17

What fraction of the variation of cost is explained by the least squares regression?

Accepted Answer

91.0%

Question 18

What is the date of the AP Stats Exam this year?

Accepted Answer

May 15

Question 19

On a normal curve, what percent of values fall within 2 standard deviations of the mean?

Accepted Answer

about 95%

Question 20

Which is NOT a condition that needs to be satisfied in a binomial setting?

Accepted Answer

observations need to be approximately normal

Question 21

Every 3rd person that enters the room gets to participate in a survey. This type of sampling is

Accepted Answer

systematic sampling

Questions 21