A Researcher Investigates Whether the Extent to Which People Care

A researcher investigates whether the extent to which people care about keeping their house clean and neat changes if they are given new things in that home.He follows eight families that were selected to receive home makeovers, assessing their cleanliness before the makeover and after.Given the confidence interval [-1.26, 0.95], what decision about the hypothesis should be made?

A) Reject the null hypothesis because the confidence interval includes the null hypothesized value.
B) Reject the null hypothesis and conclude that cleanliness did not change as a result of the manipulation.
C) Fail to reject the null hypothesis because 0 falls in the confidence interval.
D) Fail to reject the null hypothesis because the confidence interval has positive and negative values.