The College Board American College Testing Program reported a population mean SAT score of 1020, with...

The College Board American College Testing Program reported a population mean SAT score of 1020, with a standard deviation of 100. a. Let’s say a local school wants to estimate their senior class average SAT score at 90% confidence within 10 points, how many student scores should they sample? 1 pt. b. Let’s say that they sample 49 scores. What is the probability that this school’s would get a sample average of 1015 or worse, if they actually have a true average the same as the national mean of 1020? 1 pt. c. What should the local school report for their average SAT at 90% confidence, if they got a sample average of 1015? 1 pt.

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Rahul Sunny answered 1 year ago

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