Consider the following results for two samples randomly taken from two normal populations.
Sample I
Sample II
Sample Size28
34
Sample Mean48
44
Population IPopulation IIStandard Deviation10
10
?
a.Develop a 90% confidence interval for the difference between the two population means.b.Is there conclusive evidence that one population has a larger mean? Explain.
What will be an ideal response?
?
| a. | -.20 to 8.20 |
| b. | No, because the range of the interval is from negative to positive. |
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