STATS Module 3 Question Set 1

| September 28, 2018

The data set shown below
gives the calories and salt content in 17 brands of meat hot dogs.

·
Enter the data set into excel. Using
excel perform a least squares regression on the data set. Use Sodium as
the y variable and Calories as the x variable. Make a scatter plot with
the regression line plotted as well. Using excel compute the correlation
coefficient.

·
Insert the plot you created into a word
document. Discuss the scatter plot and regression line. Are their
outliers? Does your correlation coefficient support your analysis?
Does it tell you anything else?

·
If there is an outlier remove the outlier from
the data set and repeat the previous two parts.

·
Can you conclude that hot dogs with more
calories will have more sodium (i.e. discuss correlation and causation)?

Brand

Calories

Sodium (mg)

1

173

458

2

191

506

3

182

473

4

190

545

5

172

496

6

147

360

7

146

387

8

139

386

9

175

507

10

136

393

11

179

405

12

153

372

13

107

144

14

195

511

15

135

405

16

140

428

17

138

339

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