Chapter 5-7 Quiz

What is the probability of rolling a 3 on a fair six-sided die?

• 1/3

• 1/6

• 1/2

• 1/12

If you have a bag with 3 red, 2 green, and 5 blue marbles, what is the probability of pulling out a green marble?

• A. 1/5

• B. 2/10

• C. 1/2

• D. 5/10

In a normal distribution, what proportion of scores fall between z = -1 and z = 1?

• 95%

• 68%

• 99%

• 34%

What is the area in the tail beyond z = 2.00?

• .9772

• .0228

• .5000

• .0456

Given a mean of 50 and a standard deviation of 10, what is the z score for a value of 60?

• A. 1.00

• B. 0.50

• C. 1.50

• D. -1.00

Why is the probability of z > 2.75 smaller than z < -1.50?

• A. Because 2.75 is a lower z score.

• B. Because z = 2.75 lies further out in the tail than z = -1.50.

• C. Because probabilities are symmetrical.

• D. Because 1.50 is a larger number.

If the area in the body for z = 1.50 is .9332 and for z = 0.50 is .6915, what is the probability between them?

• .2417

• .3085

• .8647

• .1173

A pie chart shows 25% for football, 35% for baseball, and 40% for soccer. What is the probability of randomly selecting someone who prefers football or baseball?

• 25%

• 60%

• 75%

• 40%

Tags

NGSS.HS-LS3-3

Given the area in the body for z = 1.62 is .9474, what is the area in the tail?

• .9474

• .0526

• .1573

• .0050

Why is using a z table helpful in probability calculations?

• It simplifies the formulas for calculating probability.

• It tells us the population mean.

• It provides cumulative probabilities for standard normal distributions.

• It helps determine sample size.