Dr. Patton is a professor of English. Recently she counted the number of misspelled words in a group of student essays. She noted the distribution of misspelled words per essay followed the normal...

Dr. Patton is a professor of English. Recently she counted the number of misspelled
words in a group of student essays. She noted the distribution of misspelled words
per essay followed the normal distribution with a population standard deviation of
2.44 words per essay. For her 10 a.m. section of 40 students, the mean number of

misspelled words was 6.05. Construct a 95% confidence interval for the mean num-
ber of misspelled words in the population of student essays.