Question

In: Statistics and Probability

QUESTION 17 What alpha level matches with 90% confidence? A. .01 B. .05 C. .10 D....

QUESTION 17

  1. What alpha level matches with 90% confidence?

A.

.01

B.

.05

C.

.10

D.

.90

QUESTION 18

  1. What alpha level matches with 95% confidence?

A.

.01

B.

.025

C.

.05

D.

.10

QUESTION 19

  1. What alpha level matches with 99% confidence?

A.

.005

B.

.01

C.

.05

D.

.10

Solutions

Expert Solution

A

At 90% confidence level

= 1 - 90%  

= 1 - 0.90 =0.10

/2 = 0.05

Z/2 = Z0.05 = 1.645 ( Using z table )

C.

.10

B.

At 95% confidence level the z is ,

= 1 - 95% = 1 - 0.95 = 0.05

/ 2 = 0.05 / 2 = 0.025

Z/2 = Z0.025 = 1.96 ( Using z table )

= 0.05

C

At 99% confidence level the z is,

= 1 - 99%

= 1 - 0.99 = 0.01

/2 = 0.005

Z/2 = 2.58    ( Using z table )

= 0.01

orchestra answered 2 years ago
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