Prob and Stats Exam Review

A jar contains 5 yellow and 2 purple marbles. If two marbles are drawn from the jar without replacement, what is the probability that both will be yellow?

• 35%

• 51%

• 48%

• 138%

If a jar contains 5 pink, 4 red, 5 blue, and 6 yellow gumballs, what is the probability that the gumball drawn will NOT be blue?

• 37.5%

• 50%

• 25%

• 75%

If a coin is tossed 3 times, what is the probability of getting exactly 1 head?

• 1/4

• 3/8

• 1/2

• 5/8

What is the probability that someone who likes Toyotas is female?

• .525

• .4627

• .6774

• .3143

The probability of what:

• P(A^C)

• Probability of the complement of A

• P(A∪B)

• Probability of A given B

• P(A)

• Probability of A

• P(A∩B)

• Probability of A or B

• P(A|B)

• Probability of A and B

What is the median of the sample 5, 5, 11, 9, 8, 5, 8, 7?

• 5

• 7.5

• 8

• 7

A survey was conducted to determine sports participation at Shelby Middle School. 100 student athletes were surveyed, and their summarized responses can be seen in this table. Of the people who played football, what percent were female?

• 39%

• 52%

• 25%

• 33%

A jar contains 4 blue marbles, 5 red marbles, and x green marbles. If the probability of drawing a red marble is 20%, how many green marbles are there in the bag?

• 15

• 16

• 18

• 20

Kasey has 10 pencils, 2 pens, and x highlighters in his backpack. If the probability of removing a random item from his backpack and getting a pencil is 50%, how many highlighters does she have?

• 4

• 5

• 8

• 10

Methods involving the use of sample data to make generalizations about a population.

• descriptive statistics

• inferential statistics

• mathematical expectancy

• parameters