Question: From a population that is not normally distributed and whose standard deviation is not known, a sample of 45 items is selected to develop an

From a population that is not normally distributed and whose standard deviation is not known, a sample of 45 items is selected to develop an interval estimate for . Which of the following statements is true?

a. The t distribution with 45 degrees of freedom must be used.

b. The t distribution with 44 degrees of freedom must be used.

c. The standard normal distribution can be used.

d. The sample size must be increased in order to develop an interval estimate.

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