Question

I have a Statistics question involving z-scores.

Answer 1

state the z-scores for

Part a

Confidence level 95% ------> z=1.96

we have 95%

divide by 2

95%/2=47.5%

Convert to decimal

47.5%=47.5/100=0.475

using the z-scores table

For p=0.475 ------> z=1.96

Part b

88.4%

Divide by 2

44.2% ------> 0.442

using the z-scores table

For p=0.442 -------> z=1.57

Part c

72.39%

Divide by 2

36.195% ----->0.36195

using the z-scores table

For p=0.36195 ------> z=1.09

Part d

99.85%

Divide by 2

49.925% -----> 0.49925

using the z-scores table

For p=0.49925 ------> z=3.18

Part e

37.33%

Divide by 2

18.665% ------> 0.18665

using the z-scores table

For p=0.18665 -----> z=0.49