Dr Patton Is a Professor of English

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