Restaurant 4 Review

What is the formula to find the z-score for population?

• z=X-M

• z=σ-M/μ

• ^z/M=μ

• z=X-μ/σ

Tags

CCSS.HSS.ID.A.4

The sign of the z-score indicates whether the location is above(positive) or below(negative) the mean.

• True

• False

Find the z-scores value corresponding if the location is above the mean by 1/2 standard deviations

• -0.50

• +1.00

• +0.50

• -1.00

Find the Z-score.

Mean = 22

Standard Deviation: 3.1

x = 29

• 2.26

• 16.45

• -2.26

• 1.26

Find the Z-score.

Mean = 21

Standard Deviation: 1.3

x = 22

• 0.77

• 5.33

• 1.07

• 1.26

A data set has a mean of 290 and a standard deviation of 20. Calculate the z-score for 265.

Tags

CCSS.HSS.ID.A.4

A data set has a mean of 20 and a standard deviation of 3. Calculate the z-score for 23.

• 298

• 296

• 220

• 380

Tags

CCSS.HSS.ID.A.4

• It means you did better than zero people.

• It means you scored the same grade as the average grade.

• It means you earned a zero on the quiz.

• It means the average score was a zero.

Use the image of the normal graph provided. What is the value of the standard deviation?

• 6

• 12

• 36

• 18