A marketing manager conducted a survey to determine whether there is a linear relationship between money spent on advertising and company sales. The data are provided in the table. The advertising expenses (?) are in thousands of dollars and the company sales (?) are in thousands of dollars. ? 2.4 1.6 2.0 2.6 1.4 1.6 2.0 2.2 ? 225 184 220 240 180 184 186 215 (a) Compute the correlation coefficient between money spent on advertising and company sales. (b) Which of the following the best interpretation of the correlation coefficient?

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A marketing manager conducted a survey to determine whether there is a linear relationship between money spent on advertising and company sales. The data are provided in the table. The advertising expenses (?) are in thousands of dollars and the company sales (?) are in thousands of dollars.

?

2.4

1.6

2.0

2.6

1.4

1.6

2.0

2.2

?

225

184

220

240

180

184

186

215

(a) Compute the correlation coefficient between money spent on advertising and company sales.

(b) Which of the following the best interpretation of the correlation coefficient?

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