Standard Normal Distributions and Z-scores

Find the z-score value corresponding if the location is below the mean by 2 standard deviations

• +2.00

• -2.00

• +1.25

• -1.00

Tags

CCSS.HSS.ID.A.4

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

Tags

CCSS.HSS.ID.A.4

What is the purpose of z-scores?

• to describe the exact location of a score within a distribution

• to find the mean of the distribution

• to describe the shape of the distribution

• to find the standard deviation of the distribution

Tags

CCSS.HSS.ID.A.4

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

CCSS.HSS.MD.A.3

• 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.

Tags

CCSS.HSS.ID.A.4

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

• 6

• 34

• 52

• 70

Tags

CCSS.HSS.ID.A.4

CCSS.HSS.MD.A.1

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

• 6

• 12

• 36

• 18

Tags

CCSS.HSS.ID.A.4

Find the Z-score.

Mean = 22

Standard Deviation: 3.1

x = 29

• 2.26

• 16.45

• -2.26

• 1.26

Tags

CCSS.HSS.ID.A.4