INTRODUCTION TO STATISTICS (PAM2100001LEWISFALL2009)
> 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
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview.
Sign up
to
access the rest of the document.
 Spring '08
 ABDUS,S.
 Standard Deviation, new directed readings, complete sales information

Click to edit the document details