software analysis of the salaries of a random sample of 288

software analysis of the salaries of a random sample of 288 nevada teachers produced the confidence interval shown below. which conclusion is correct? whats wrong with the others?

with 90% confidence for u

t-interval 4345 < u (techpay) < 45398

a) if we took many random samples of 288 nevada teachers, about 9 out of 10 would produce this confidence interval

b) if we took many random samples of nevada teachers about 9 out of 10 of them would produce a confidence interval that contained the mean salary of all nevada teachers

c) about 9 out of 10 nevada teachers earn between $43,454 and $45, 398

d) about 9 out of 10 of the teachers surveyed earn between $43,454 and $45, 398

e) we are 90% confident that the average teacher salary in the U.S. is between $43,454 and $45, 398

Solution

we are 90% confident that the average teacher salary in the U.S. is between $43,454 and $45, 398

Confidence interval is always interpreted in terms of the population. So the other answers fail in this aspect.