Z-scores

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

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 = 21

Standard Deviation: 1.3

x = 22

• 0.77

• 5.33

• 1.07

• 1.26

Tags

CCSS.HSS.ID.A.4

What is the probability that a score is under (left of) .73?

• .7357

• .7673

• .7389

• .7967

Tags

CCSS.HSS.ID.A.4

CCSS.HSS.MD.A.3

What is the probability that a score is under (left of) 1.73?

• .9484

• .9664

• .9573

• .9582

Tags

CCSS.HSS.ID.A.4

CCSS.HSS.MD.A.3

What is the probability that a score is under (left of) 2.37?

• .9911

• .9913

• .9916

• .9936

Tags

CCSS.HSS.ID.A.4

CCSS.HSS.MD.A.3

What is the probability that a score is under (left of) -.37?

• .6443

• .3974

• .3557

• .3156

Tags

CCSS.HSS.ID.A.4

CCSS.HSS.MD.A.3

What is the probability that a score is under (left of) -1.37?

• .0853

• .9147

• .8997

• .1003

Tags

CCSS.HSS.ID.A.4

What is the probability that a score is above (right of) 2.37?

• .0116

• .0089

• .0068

• .0051

Tags

CCSS.HSS.ID.A.4

CCSS.HSS.MD.A.3

What is the probability that a score is above (right of) -.64?

• .2643

• .7357

• .7389

• .2611

Tags

CCSS.HSS.ID.A.4