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Independent random samples selected from two normal populations produced the following sample means and standard deviations....

Independent random samples selected from two normal populations produced the following sample means and standard deviations.

Sample 1 Sample 2
n1 = 15 n2 = 11
x1 = 7.1     x2= 9.2
s1 = 2.3 s2 = 2.8

Find the 80% Confidence Interval for the difference in the population means of Sample 1 and 2.
Circle the correct conclusion below:

A) The result suggests that there is no significant difference between the means.
B) The result suggests that Sample 1 population mean is less than Sample 2 population mean.
C) The result suggests that the confidence interval is inconclusive.
D) The result suggests that Sample 1 population mean is greater than Sample 2 population mean.

Math   Statistics-And-Probability   
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TOPIC:Confidence interval for the difference between the population means.

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