# Confidence interval problem

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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#### Solution Preview

In this question,

N = 40

M = 6.05

SD = 2.44

we use two-tailed 95% t value with ...

#### Solution Summary

Solution provides clear example on how to construct a confidence interval for the mean number of misspelled words in a collection of student essays.

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