Ten different families are tested for the number of gallons of water a day they use...

Ten different families are tested for the number of gallons of water a day they use before and after viewing a conservation video. At the 0.05 significance level, test the claim that the mean is the same before and after the viewing.

List the null and alternative hypothesis,
the critical value,
the test statistic with and s_d.
Draw the graph and label the test statistic, critical value and rejection regions.
Reject or fail to reject?
State the conclusion

Before	33	33	38	33	35	35	40	40	40	31
After	34	28	25	28	35	33	31	28	35	33

Expert Solution

Let us denote the difference

d = the number of gallons of water a day they use before - the number of gallons of water a day they use after

There is not sufficient evidence to support the claim that the mean is the same before and after the viewing.

orchestra answered 2 years ago

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