Suppose your statistics instructor gave six examinations during the semester. Yo
ID: 3020462 • Letter: S
Question
Suppose your statistics instructor gave six examinations during the semester. You received the following grades (percent correct): 90, 73, 87, 89, 92, and 74. Instead of averaging the six scores, the instructor indicated he would randomly select three grades and compute the final percent correct based on the three percents.
Compute the mean of the sample means and compare it to the population mean. (Round your answers to 3 decimal places.)
Suppose your statistics instructor gave six examinations during the semester. You received the following grades (percent correct): 90, 73, 87, 89, 92, and 74. Instead of averaging the six scores, the instructor indicated he would randomly select three grades and compute the final percent correct based on the three percents.
Explanation / Answer
Sample mean not equal to population mean
Different sample of 3 from 6 will be 6C3 20 90 73 87 89 92 c) Sample mean 84.16667 Different samples 1 90 73 87 83.33333 2 90 73 89 84 3 90 73 92 85 4 90 73 74 79 5 90 87 89 88.66667 6 90 89 74 84.33333 7 90 92 74 85.33333 8 73 87 89 83 9 73 87 92 84 10 73 87 74 78 11 73 89 92 84.66667 12 73 89 74 78.66667 13 73 92 74 79.66667 14 87 89 92 89.33333 15 87 89 74 83.33333 16 87 92 74 84.33333 17 89 92 74 85 18 90 87 74 83.66667 19 90 87 92 89.66667 20 90 89 92 90.33333 Pop mean 84.16667Related Questions
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