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Independent sample t test: Sales Consistency

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AU Cellular believes their sales are more consistent than their rival Softbank Cellular. Below is the number lost calls a day over the last seven days. Do you agree with AU? Use the .01 significance level.

Softbank, 78, 98, 54, 57, 68, 64, 70
AU, 75, 81, 81, 40, 82, 75, 35

- Show formua used and walk through the steps.
- State the hypotheses and identify the claim
- Find the critical values
- Compute the test value
- Make the decision to reject or not reject the null hypothesis
- Summarize the results

https://brainmass.com/statistics/students-t-test/independent-sample-t-test-sales-consistency-381155

Solution Preview

Hypothesis Testing
AU cellular believes their sales are more consistent than their rival Softbank cellular. Below is the number lost calls a day over the last seven days. Do you agree with AU? Use the .01 significance level.

Softbank, 78, 98, 54, 57, 68, 64, 70
AU, 75, 81, 81, 40, 82, 75, 35

- Show formula used and walk through the steps.
- State the hypotheses and identify the claim
- Find the critical values
- Compute the test value
- Make the decision to reject or not reject the null hypothesis
- Summarize the results