4. (15%) A survey of 400 college seniors resulted in the following cross tabulation regarding their undergraduate major and whether or not they plan to go to graduate school.

Undergraduate Major

Graduate School

Business

Engineering

Others

Total

Yes

35

42

63

140

No

91

104

65

260

Total

126

146

128

400

a.

Are a majority of the seniors in the survey planning to attend graduate school?

b.

Which discipline constitutes the majority of the individuals in the survey?

c.

Compute row percentages and comment on the relationship between the students' undergraduate major and their intention of attending graduate school.

d.

Compute the column percentages and comment on the relationship between the students' intention of going to graduate school and their undergraduate major.

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5. (15%) A local electronics retailer recently conducted a study on purchasers of large screen televisions. The study recorded the type of television and the credit account balance of the customer at the time of purchase. They obtained the following results.

Credit Balance Standard tv LCD Plasma Projection

Under $200. 10 16. 40. 5

$200-$800 8 12 24. 15

0ver $800 16 12 16 30

Total 34 40 80 50

Construct a table of row percentages.Discuss the outcomes and what these numbers represent.

6. (15%) Draw two bar charts that compare type of customer for males vs. females. Are gender and promotional customers related?Why or why not? You can use Excel or draw by hand at this time. Briefly discuss results.

Type of Customer

Gender

Regular

Male

Promotional

Female

Regular

Female

Regular

Female

Regular

Female

Regular

Female

Regular

Female

Promotional

Female

Regular

Male

Promotional

Female

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7.

Essay (10%): Descriptive statistics involves describing the key relationships between all sorts of data be it visual or numerical. Using examples outside of textbook briefly discuss the following. The length of the essay should be a minimum of at least one side of a page.

Bar charts, histograms, pie charts and trend lines. Discuss the importance of each of these and where they are best used. Provide only one real example of and where it is used.