Question 10 5 pts A house cleaning service claims that it can clean a four bedroom house in less than 2 hours. A sample of n = 16 houses is taken and the sample mean is found to be 1.97 hours and the sample standard deviation is found to be 0.1 hours. Using a 0.05 level of signicance the correct conclusion is 0 do not reject the null because the test statistic (1.2) is > the critical value (-1.7531). 0 do not reject the null because the test statistic (-1.2) is > the critical value (-1.7531). 0 reject the null because the test statistic (-1.2) is