Chapter 5, Section 2, Exercise 034

Find thez*

values based on a standard normal distribution for each of the following.

(a) A78%

confidence interval for a proportion.

Round your answer to three decimal places.

z*=

the absolute tolerance is +/-0.01

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(b) An84%

confidence interval for a slope.

Round your answer to three decimal places.

z*=

the absolute tolerance is +/-0.01

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(c) A92%

confidence interval for a standard deviation.

Round your answer to three decimal places.

z*=

the absolute tolerance is +/-0.01

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