SOLUTION: there are 300 students enrolled in business statistics.historically, exam scores are normally distributed with a standard deviation of 30.9. your instructor randomly selected sampl

SOLUTION: there are 300 students enrolled in business statistics.historically, exam scores are normally distributed with a standard deviation of 30.9. your instructor randomly selected sampl

Algebra.Com

Question 936156: there are 300 students enrolled in business statistics.historically, exam scores are normally distributed with a standard deviation of 30.9. your instructor randomly selected sample of 30 examinations and finds a mean of 74.2. determine a 90% confidence interval for the mean score for all students taking the course ?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
ME = 1.645(30.9/sqrt(300) = 2.9
CI: 74.2 - 2.9 < u < 74.2 + 2.9
RELATED QUESTIONS
At a university with 1,000 business majors, there are 200 business students enrolled... (answered by stanbon)

In a Statistics examination, the average score was 80 and the variance was 9. Students... (answered by Theo)

A class of 200 students takes an exam. The students' scores are normally distributed with (answered by stanbon)

At a university with 1,000 business majors, there are 200 business students enrolled in... (answered by solver91311,stanbon)

Suppose the scores of students on a Statistics course are Normally distributed with a... (answered by Glaviolette)

There are 330 students at Valley Central High School enrolled in Chemistry. On the April... (answered by VFBundy)

The scores on an exam are normally distributed, with a mean of 77 and a standard... (answered by Edwin McCravy)

Hi. Please help me solve stats question Suppose scores on exams in statistics are... (answered by Theo)

For a simple random sample of adults, IQ scores are normally distributed with a mean of... (answered by ewatrrr)