Dr Patton Is a Professor of English

question 57

Multiple Choice

Dr. Patton is a professor of English. Recently she counted the number of misspelled works in a group of student essays. She noted the distribution of misspelled words per essay followed the normal distribution with a standard deviation of 2.44 words per essay. For her Tuesday class of 44 students, the mean number of misspelled words per essay was 6.05. Construct a 90% confidence interval for the mean number of misspelled words in the population of student essays.

• A) 5.374 to 6.726
• B) 5.161 to 6.939
• C) 5.102 to 6.998
• D) 5.482 to 6.618
• E) 5.445 to 6.6551

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