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Chapter 8: Q 8.27 (page 330)

Find the confidence level and 鈭� for

a. 90%confidence interval.

b. 94%confidence interval.

Short Answer

Expert verified

a. 伪=0.10and confidence level is0.90

b. 伪=0.01and confidence level is0.99

Step by step solution

01

Given Information

We are given with two confidence levels90%and99%.

02

Calculation of confidence level and α for 90% confidence interval.

We know that

For 100(1-伪)%confidence interval, confidence level is 1-伪(0<伪<1)

90%confidence interval implies 100脳0.9%confidence interval.

鈬�1-伪=0.90

Hence, confidence level is 0.90

伪=1-0.90=0.10

03

Calculation of confidence level and α for 99% confidence interval

99%implies 100脳0.99%confidence interval.

鈬�1-伪=0.99

Confidence level is 0.99

and伪=1-0.99=0.01

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