REVIEW ON PERCENTILES, Z-SCORE

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

Find the Z-score.

Mean = 27

Standard Deviation: 1.4

x = 11

• -11.43

• 7.85

• -2.33

• 4.16

Tags

CCSS.HSS.ID.A.4

Find the z-score.

Mean = 45

Standard Deviation: 2.1

x = 50

• 2.38

• 3.00

• 3.08

• 2.33

Tags

CCSS.HSS.ID.A.4

Find the mean

Z-score = -0.4

Standard Deviation: 7

x = 20

• 22.8

• 17.2

• 22.04

• 32.5

Tags

CCSS.HSS.ID.A.4

CCSS.HSS.MD.A.2

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

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

How to transform z-scores to X values for sample?

• X=μ+zσ

• X=M+zs

• μ=X+zσ

• σ(z)-M=s

Tags

CCSS.HSA.CED.A.4

CCSS.HSA.SSE.A.1

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

Transforming raw scores to z-scores will change the shape of the distribution

• True

• False

Tags

CCSS.HSS.ID.A.3

CCSS.HSS.ID.A.4

The mean of the z-score will always be zero even though the raw scores is 100

• True

• False