Suppose test scores can range from 0 to 200 and follow an (approximately) Normal distribution with mean 115 and standard deviation o = 25. Ho: µ = 120 and the alternative Ha: uz 120. A class of 30...


Suppose test scores can range from 0 to 200 and follow an (approximately) Normal distribution with mean 115<br>and standard deviation o = 25.<br>Ho: µ = 120 and the alternative Ha: uz 120.<br>A class of 30 students had a mean score of 117.<br>a.<br>What is the value of the test statistic z?<br>b. What is the P-value?<br>С.<br>Would you reject or fail to reject the null at the 5% significance level? Why?<br>

Extracted text: Suppose test scores can range from 0 to 200 and follow an (approximately) Normal distribution with mean 115 and standard deviation o = 25. Ho: µ = 120 and the alternative Ha: uz 120. A class of 30 students had a mean score of 117. a. What is the value of the test statistic z? b. What is the P-value? С. Would you reject or fail to reject the null at the 5% significance level? Why?

Jun 04, 2022
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