Question

the means the same before and after the 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 picance level test them viewing Before 33 33 33 35 35 20 40 40 31 After 34 3135 30 35 33 39 34 35 33 pwalue: 0.0774 Because p alpha we fail to reject the null hypothesis. There is not sur cent evidence to reject the claim that the mean is de bere and after viewing value: p=0.0406 Because p ipa, we reject the null hypothesis. There is sufficient evidence to reject the claim that the mes te below and viewing P-value: -0.0438 Because p alpha, we reject the null hypothesis. There is sufficient evidence to reject the claim that the means there bere ander viewing P value p=0.1736 Because p alpha we fail to reject the nullypothesis. There is not suicient evidence to reject the claim that the means the same before and after weg

Answer 1

The statistical software output for this problem is:

Paired T hypothesis test: Hp H, Mean of the difference between Before and After H:H00 Hypothesis test results: Difference Mean Std. Err. Before - After 19 0.79512403 DF T-Stat 9 2.3895643 P-value 0.0406

Hence,

p - Value = 0.0406

Option B is correct.