Probability and Statistics Quiz

What is the probability of randomly selecting an odd number from the numbers 1-15?

• A. 1/3

• B. 1/2

• C. 8/15

• D. 1/15

Twelve students have an equally likely chance of being selected in a drawing at school. Eight are 7th graders and four are 8th graders. What is the probability that an 8th grader will be selected?

• A. 1/3

• B. 1/2

• C. 2/3

• D. 1/4

The probability of a spinner landing on yellow is 1/4. What does 3/4 represent?

• A. P(yellow)

• B. P(blue)

• C. P(yellow')

• D. P(purple and blue)

Marty can go to one movie on either Friday or Saturday. He will be able to choose either a comedy or an action movie. Which list shows all the possible outcomes of one movie on one day?

• A. Comedy, Friday Action, Saturday

• B. Comedy, Action Friday, Saturday

• C. Action, Friday Action, Saturday

• D. Comedy, Friday Action, Friday

In a game, the player wins if he rolls a 4 on a number cube. If the number cube is rolled 24 times, what is a reasonable prediction for the number of unsuccessful rolls?

• A. 18

• B. 20

• C. 22

• D. 24

A health study of 540 adults found that only 7 in 20 adults get enough sleep each night. Based on the results of the sample, how many adults got enough sleep?

• A. 189

• B. 202

• C. 270

• D. 350

What is the probability of both coins landing on heads when two coins are flipped?

• 1/4

• 1/2

• 3/4

• 1/3

If 3 out of the first 10 students at a school assembly were wearing spirit wear, how many students out of 400 would be expected to wear spirit wear?

• 120

• 30

• 150

• 90

What is the probability of selecting a letter 'U' from the word AUGUST?

• 1/6

• 1/3

• 1/2

• 2/3

What is the probability of the spinner not landing on a heart?

• 3/4

• 1/2

• 2/3

• 5/7