If the population variances are assumed to be known in an application where a manager wishes to estimate the difference between two population means, the 95 percent confidence interval estimate can be developed using which of the following critical values:

a. z = 1.645.

b. z = 1.96.

c. t value that depends on the sample sizes from the two populations.

d. z = 2.575.

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29 November, 08:45

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Shelly · Answer 1

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