. A chain that specializes in healthy and organic foodwould like to compare the sales performance of two of its primarystores in the state of Massachusetts. These stores are both inurban, residential areas with similar demographics. Assuming equalvariances, a comparison of the weekly sales randomly sampled over aperiod of nearly two years for these two stores yields thefollowing information (reported in $1,000). Is there a differencein sales between the two stores?
Store | N | Mean | StDev |
Store #1 | 9 | 242 | 24 |
Store #2 | 9 | 235 | 30 |
- State the null and alternative hypotheses
- What is the test statistic?
- Using a .05 significance level, what is the decision rule?
- Show the test statistic and essential calculations.
- What do you conclude? State you findings in a sentence
