A computer program has produced the following output for the hypothesis testing problem: 

Difference in sample means: 11.5

Degrees of freedom: 24

Standard error of the difference in the sample means:?

Test statistics: t_0=-1.88

P-Value = 0.0713

What is the missing value for the standard error? 2. Is this a two-sided or one-sided test? 3. If α=0.05, what are your conclusions? 4. Find a 90% two-sided CI on the difference in the means.

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