Answer to Question #329502 in Statistics and Probability for frank

Question

The following are data for 12 individuals’ daily sodium intake and their systolic blood pressure readings. A research investigator is interested in learning how strong the association is between these variables and how well we can predict blood pressure from sodium intake.

Person

1

2

3

4

5

6

7

8

9

10

11

12

Sodium (X)

6.8

7.0

6.9

7.2

7.3

7.0

7.0

7.5

7.3

7.1

6.5

6.4

BP (Y)

154

167

162

175

190

158

166

195

189

186

148

140

a. Calculate the correlation coefficient r and test if it is statistical significant at α = 0.05 level (5 marks) 

b. Calculate the regression equation for data (10 marks)

c. What would be a likely blood pressure for a person with a sodium intake of:

i. 6.3 (2.5 marks)

ii. 7.6 (2.5 marks)

Answer 1

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