Q. Which of the following measures are not affected by outliers? A. The mean B. The standard deviation C. The IQR

Q. Does the value of the standard deviation depend on the value of the mean?

A. Yes. If the mean gets larger the standard deviation will also get larger.

B. Yes. You need to know the mean to be able to calculate the standard deviation.

C. No. The center of a distribution and the spread are not related.

Q. A survey of college students collected information on several variables: Distance from Home, Age, Major, Gender, and Class. The variable Major is

A. quantitative.

B. categorical.

C. Neither categorical nor quantitative.

Q. An eager statistics student wanted to help his boss. He studied the data on products sold at the store over a period of a week and reported to his boss that the average UPC number was 1001264789 with a standard deviation of 45378. From this information his boss should

A. make sure there are lots of 1001264789 items on hand.

B. know that approximately 68% of all items had UPC codes between 1001219411 and 1001310167.

C. do nothing with the information. The statistics reported are invalid.

Q. The most common intelligence quotient (IQ) scale is Normally distributed with mean 100 and standard deviation 15. Many school districts across the country seek to identify "Gifted and Talented" children for special enrichment programs. Typically, these children must have IQ scores in the top 5%. What is the minimum score to qualify a child for these programs?

A. 130 B. 125 C. 115

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