# ps11 - INTRODUCTION TO...

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INTRODUCTION TO STATISTICS (PAM2100-001-LEWIS-FALL2009) > TAKE ASSESSMENT: PS 11 Take Assessment: ps 11 Name ps 11 Instructions Multiple Attempts Not allowed. This Test can only be taken once. Force Completion This Test can be saved and resumed later. Question Completion Status: Question 1 1 points Save We measure the amount of vitamin C in corn soy blend (CSB). The population distribution is roughly normal. The sample mean x_bar = 24 and the sample standard deviation s= 9. The sample size n= 14. Using this data, a 99% confidence interval for the population mean amount of vitamin C is constructed. What is the margin of error associated with this confidence interval (rounded to three decimal places )? Question 2 1 points Save You will have complete sales information for last month in a week, but right now you have data from a random sample of 25 stores. The mean change in sales in the sample x_bar= 5 and the standard deviation of the changes s = 11. The population distribution is roughly normal. Here are the null and alternative

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## This note was uploaded on 02/01/2010 for the course PAM 2100 taught by Professor Abdus,s. during the Spring '08 term at Cornell.

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ps11 - INTRODUCTION TO...

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