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Consider the following results for two samples randomly taken from two normal populations with equal variances....

Consider the following results for two samples randomly taken from two normal populations with equal variances.

Sample I

Sample II
Sample Size

28

35
Sample Mean

48

44
Population Standard Deviation

9

10
a. Develop a 95% confidence interval for the difference between the two population means.
b. Is there conclusive evidence that one population has a larger mean? Explain.
math   Statistics-And-Probability   
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