AP Statistics Probability/Random Variables review

Question 1

Given this box-plot, which of the following statements is true?

Accepted Answer

The IQR is approximately 8

Question 2

which of the following is NOT a condition for a binomial setting?

Accepted Answer

The probability of success must change each trial

Question 3

Given the following data and that X is a discrete random variable, what is the mean of X?

Accepted Answer

2.3

Question 4

What does the letter B stand for in the acronym BINS?

Accepted Answer

Binary

Question 5

Given the interval (0.020, 0.152), what is the point estimate?

Accepted Answer

0.086

Question 6

What is the probability that chocolate is preferred, given that a child is chosen?

Accepted Answer

0.55

Question 7

What is the probability that there will be no more than three people waiting in line?

Accepted Answer

0.9

Question 8

If P(A) = .41, and P(B) = .32, find P(A or B).

Accepted Answer

0.5988

Question 9

Random variable X is normal with μx=6.8 and σx=1.6, What is P(X>9)

Accepted Answer

0.0846

Question 10

If P(D)= .11, P(R) = .78, and P(I) = .11, what is the probability of D or R winning?

Accepted Answer

0.89

Question 11

Which of the following is a discrete random variable?

Accepted Answer

Number of blue marbles in a jar

Question 12

What is the sum of probabilities in a sample space equal to?

Accepted Answer

1

Question 13

Which of the following is a continuous random variable

Accepted Answer

The temperature of any randomly selected room on any day

Question 14

Given that X and Y are random variables with σX=.70 and σY=.51, what is σX-Y?

Accepted Answer

0.87

Question 15

What does Mutually Exclusive mean in Probability?

Accepted Answer

That two events will never occur together

Question 16

A person rolls a 6-sided die 8 times. What is the probability of rolling a 1 exactly 3 times

Accepted Answer

8C3 (1/6)3 (5/6)5

Question 17

What is a random variable?

Accepted Answer

A set of numerical values that happen by a chance event

Question 18

For any A and B random variables, which of the following statements must be true

Accepted Answer

σ2A-B = σ2A + σ2B, μA+B = μA + μB

Question 19

A coin is tossed three times. What is the probability that it lands on heads exactly one time?

Accepted Answer

0.375

Question 20

Given this tree diagram, what is P(Late) on any given day?

Accepted Answer

0.125

Questions 20