A local University administers a comprehensive examination t

A local University administers a comprehensive examination to the recipients of a B.S. degree in Business Administration. A sample of Examinations is selected at random and scored. The scores are shown Below.

Grade

54, 68, 75, 80, 98

At 98% confidence, determine an interval for the mean of the population.

Solution

Multiple choice test has 10 questions, each with 5 choices. 1/5 choice is correct. An individual randomly guesses answer to every question. (Independent)

54, 68, 75, 80, 98

MEAN =(54+ 68+75+ 80+ 98) /5=75

Sd=16.155

T