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everlyn85 everlyn85
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6 years ago
From a population that is not normally distributed and whose standard deviation is not known, a sample of 50 items is selected to develop an interval estimate for . Which of the following statements is true?
 a. The standard normal distribution can be used.
 b. The t distribution with 50 degrees of freedom must be used.
 c. The t distribution with 49 degrees of freedom must be used.
 d. The sample size must be increased in order to develop an interval estimate.
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