Chapter 5, Section 2, Exercise 035

Find thez*

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

(a) An88%

confidence interval for a correlation.

Round your answer to three decimal places.

z*=

the absolute tolerance is +/-0.01

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(b) A90%

confidence interval for a difference in proportions.

Round your answer to three decimal places.

z*=

the absolute tolerance is +/-0.01

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(c) A98%

confidence interval for a proportion.

Round your answer to three decimal places.

z*=

the absolute tolerance is +/-0.01

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