EBook Problems EDA Center

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Revision as of 03:01, 19 November 2008

EBook Problems Set - Measures of Central Tendency Problems

Problem 1

Suppose that in a certain country, the average yearly income for 75% of the population is below average, what would you use as the measure of center and spread?

• Choose one answer.

(a) Mean and interquartile range

(b) Mean and standard deviation

(c) Median and interquartile range

(d) Mean and standard deviation

Problem 2

According to a story in the Guardian newspaper in the U.K., the mean wage for a Premiership player in 2001-2002 in the U.K. was 600,000 pounds. Which of the following is most likely true?

• Choose one answer.

(a) About as many Premiership players make more than 600,000 pounds as make less.

(b) Most Premiership players make close to 600,000 pounds.

(c) Most Premiership players make less than 600,000 pounds.

(d) Most Premiership players make more than 600,000 pounds.

3. If the observations larger than 40 are deleted in the following histogram, what will happen to the value of the mean?

Choose one answer.

(a) It will become larger.

(b) It will become smaller.

(c) Need more information to answer this question.

(d) It will not change.