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in order to test the difference in populations

In order to test the difference in population's means, samples were collected for two independent populations where the variances are assumed equal and the population normally distributed. The following data resulted:
population 1 population 2
xbar=112 xbar=107
s=14 s=17
n=25 n=28
The value of the pooled standard deviation is 15.66.
true or false? why?

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