Question

in a campus interview 64 students are attended for a test and taken average of 28.5 minutes to complete the answers with a variance of 9.3 square minutes. the 99% confidence interval for the true interval time it takes a freshman to complete the test is​

Answer 1

Answer:

Confidence Level Area between 0 and z-score z-score

90% 0.4500 1.645

95%. 0.4750. 1.960

98%. 0.4900 2.326

99% 0.4950. 2.576

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