# Question

Cost observations have been provided for 21 production situations. Find the appropriate t value from the t table to use for each of the following confidence interval calculations:

a. Two-sided 95% confidence.

b. Two-sided 99% confidence.

c. Two-sided 99.9% confidence.

d. Two-sided 90% confidence.

a. Two-sided 95% confidence.

b. Two-sided 99% confidence.

c. Two-sided 99.9% confidence.

d. Two-sided 90% confidence.

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