An engineer wishes to determine if the stopping distance for midsize automobiles is different from that of compact automobiles at 75 mph. The data is shown below.
Automobile | Midsize | Compact |
1 | 188 | 200 |
2 | 190 | 211 |
3 | 195 | 206 |
4 | 192 | 297 |
5 | 186 | 198 |
6 | 194 | 204 |
7 | 188 | 218 |
8 | 187 | 212 |
9 | 214 | 196 |
10 | 203 | 193 |
a) State the null and alternate hypotheses.
b) Use a Wilcoxon rank sum test to determine if there is a
difference in the stopping distances between Midsize and compact
cars. Copy and paste the results of the test into your Word
document.
c) Include a carefully-worded conclusion in both statistical terms
and in the context of the problem.
Please state each formula and explain each step in excel.
a.
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