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Table Annual Revenue and Rating for Americas 30 Large Corporations shows are the Americas 30 large corporations, with annual revenue expressed in billions of dollars

Table Annual Revenue and Rating for Americas 30 Large Corporations shows are the Americas 30 large corporations, with annual revenue expressed in billions of dollars (source: CNN Money website, January 15, 2010) and ABCD rating index category (source: mock data). The table Annual Revenue and Rating for Americas 30 Large Corporations can be found in the table below.

Table. Annual Revenue and Rating for America's 30 Large Corporations

Corporation

Revenue

ABCD Rating Index

Amerisource Bergen

71

A

Archer Daniels Midland

70

B

AT&T

124

B

Bank of America

113

C

Berkshire Hathaway

108

A

Boeing

61

A

Cardinal Health

91

B

Chevron

263

D

Citigroup

112

C

ConocoPhillips

231

D

Costco Wholesale

72

A

CVS Caremark

87

A

Exxon Mobil

443

D

Ford Motors

146

A

General Electric

149

A

Hewlett-Packard

118

B

Home Depot

71

A

IBM

104

B

Johnson & Johnson

64

B

JPMorgan Chase

101

B

Kroger

76

C

Marathon Oil

74

A

McKesson

102

A

Morgan Stanley

62

A

Procter & Gamble

84

A

Target

65

A

UnitedHealth Group

81

B

Valero Energy

118

B

Verizon

97

B

Walmart

406

D

a. In a table, summarize the Revenue by constructing the following:

(i) a frequency distribution;

(ii) a relative frequency distribution;

(iii) a percent frequency;

(iv) a cumulative frequency distribution;

(v) a cumulative relative frequency distribution.

b. What do these distributions tell you about the annual revenue of the 30 large corporations in America?

c. Make a histogram with frequency on the y-axis and comment on the shape of the distribution.

d. Make a histogram with percent frequency on the y-axis and comment how it differs from histogram in question c.

e. In a table, show the relationship between corporation revenue and ABCD rating index using cross tabulation method.

f. Comment on the relationship between corporation revenue and ABCD rating index based on the table created in question c.

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