SOLUTION: Dr. Patton is a Professor of English. Recently he counted the number of misspelled words in a group of student essays. For his class of 40 students, the mean number of misspelled w

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Question 91552This question is from textbook
: Dr. Patton is a Professor of English. Recently he counted the number of misspelled words in a group of student essays. For his class of 40 students, the mean number of misspelled words was 6.05 and the standard deviation 2.44 per essay. Construct a 95 percent confidence interval for the mean number of misspelled words in the population of student essays.
This question is from textbook

Answer by stanbon(75887) About Me  (Show Source):
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Dr. Patton is a Professor of English. Recently he counted the number of misspelled words in a group of student essays. For his class of 40 students, the mean number of misspelled words was 6.05 and the standard deviation 2.44 per essay. Construct a 95 percent confidence interval for the mean number of misspelled words in the population of student essays.
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E = 1.96*2.44/sqrt40 = 0.7562
CI = (6.05-E,6.05+E)
CI = (5.29384,6.8062)
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Cheers,
Stan H.