Two samples each of size 25 three-year-old children are taken from independent populations. The populations are distributed with equal variances. The first sample has a mean of 35.5 and a standard deviation of 3.0 while the second sample has a mean 33.0 and standard deviation of 4.0.
The pooled variance is ______________.
The computed t-statistic is ______________.
There are ______________ degrees of freedom for this test.
The critical values for a two-tailed test of the null hypothesis of no difference in the population means at the

= 0.05 level of significance ______________.
A two-tailed test of the null hypothesis of no difference would ______________ at the

= 0.05 level of significance.
The p-value for a two-tailed test whose computed t-statistic is 2.50 is between ______________.
If we were interested in testing against the one-tailed alternative that

at the

= 0.01 level of significance, the null hypothesis would ______________.
The p-value for a one-tailed test whose computed statistic is 2.50 (in the hypothesized direction) is between ______________.

During a Water Shortage, a Water Company Randomly Sampled Residential

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