O 95% confident the population mean is between 45.4 and 56) QUESTION 4 A sample

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O 95% confident the population mean is between 45.4 and 56) QUESTION 4 A sample or 40 is randomly selected from a population of students with an unknown standard deviation. To determine the 98% that should be used is: 2423 , 2.127 1.685 2.426 QUESTION 5 A sample of 40 is randomly selected from a population of students. To determine the 92% confidence interval for the population proportion, the appro nate z value that should be used is 0.08 O1.96 O 1.75 O 1645 QUESTION 6 lick Save and Submit to save and submit. Click Save All Answers to save all answers. Save All Answers c

Explanation / Answer

a) t-value with df 39 is 2.2426. Here the statistic follows t-distribution with df 39.

b) z-value with df 1.75. Here the statistic follows N(0,1).

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