SOLUTION: A random sample of 625 SAT scores has a mean of 1500. Assume that SAT scores have a population standard deviation of 250. Construct a 95% confidence interval estimate of the mean

Question 873043: A random sample of 625 SAT scores has a mean of 1500. Assume that SAT scores have
a population standard deviation of 250. Construct a 95% confidence interval estimate of the mean SAT scores. Show all work. Just the answer, without supporting work, will receive no credit
Answer by reviewermath(1029) (Show Source): You can put this solution on YOUR website!
Q:
A random sample of 625 SAT scores has a mean of 1500. Assume that SAT scores have
a population standard deviation of 250. Construct a 95% confidence interval estimate of the mean SAT scores. Show all work. Just the answer, without supporting work, will receive no credit
A:
For the lower limit of the confidence interval, enter the following formula in Excel: =1500+NORMSINV(.025)*250/SQRT(625)
For the upper limit of the confidence interval, enter the following formula in Excel: =1500-NORMSINV(.025)*250/SQRT(625)
Therefore, the 95% confidence interval is (1480.4, 1519.6)
RELATED QUESTIONS
A random sample of 225 SAT scores has a mean of 1522. Assume that SAT scores have a... (answered by stanbon)

A simple random sample of 120SAT scores has a mean of 1500. Assume that scores have a... (answered by stanbon)

5 In exercises 5-8 assume that SAT scores are normally distributed with mean u=1518 and... (answered by tommyt3rd)

The College Board reports that the nationwide mean SAT Math score was 515 in 2007. Assume (answered by stanbon)

Assume that SAT scores vary normally with a standard deviation of 100. How many students... (answered by ewatrrr)

based on a simple random sample of 100 applicants at st andrew's college, we'd like to... (answered by ewatrrr)

Please help with this: Assume the SAT test scores are normally distributed with a mean (answered by Boreal)

Assume the SAT Mathematics Level 2 test scores are normally distributed with a mean of... (answered by stanbon)

Scores on the SAT form a normal distribution with a mean score of 500 and a standard... (answered by Theo)