**PROBLEM 2 (10 points)**

A college wants to know the lower limit of a two-sided 95% confidence interval for SAT scores on the Math section (range equals 200 to 800).

They sampled 400 students and found that the sample mean was 580 and the sample standard deviation was 60.

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Here's the explanation you needed for... View the full answer

- This was a very detailed response, thank you so much vectorialcalculus. Your explanation helped me to fully understand where numbers came from and what calculations to use. I really appreciate your help.
- Alejjandra
- Apr 01, 2018 at 8:29pm

- You are welcome Alejjandra.
- vectorialcalculus
- Apr 02, 2018 at 2:38am

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#### Other Answers

The formula for Confidence Interval CI = xbar ± t alpha/2 * (sd/ Sqrt(n)) Where, xbar = Mean sd =... View the full answer

- Thank you so much for your help :)
- Alejjandra
- Apr 01, 2018 at 8:32pm