D Question 8 1 pts Let mu be the population mean. In a test of Ho: mu = 3 against HA: mu not equal to 3, the sample data with sample size 10 from a normal distribution with unknown variance yielded a test statistic Tobe = 1.21. Determine if the data provides enough evidence to reject the null hypothesis at level of significance .05? Since p-value .2, data does not provide sufficient evidence to reject the null hypothesis at level .05.. O Since p-value .2, data provides sufficient evidence to reject the null hypothesis at level .05.D Question 9 1 pts A university investigation was conducted to determine whether women and men complete medical school in significantly different amounts of time, on the average. Two independent random samples were selected and the following summary information concerning times to completion of medical school computed. Perform the appropriate test of hypothesis, at level 0.05 to determine whether there is a significant difference in time to completion of medical school between women and men. Women Men Sample Size 90 100 Mean 8.4 years 8.5 years Standard Deviation 0.6 years 0.5 years O Since the p-value of the test is 0.1075, there is not enough evidence to conclude that there is a significant difference in mean time to completion of medical school between men and women. O Since the p-value of the test is 0.2150, there is not enough evidence to conclude that there is a significant difference in mean time lo completion of medical school between men and women. O Since the p-value of the test is 0.1075, there is enough evidence to conclude that there is a significant difference in mean time to completion of medical school between men and women. O Since the p-value of the test is 0.8572, there is enough evidence to conclude that there is a significant difference in mean time to completion of medical school between men and women. Q) Since the p-value of the fest is 0.2150, there is enough evidence to conclude that there is a significant difference in mean time to completion of medical school between men and women. O Since the p-value of the test is 0.8572, there is not enough evidence to conclude that there is a significant difference in mean time to completion of medical school between men and women. D Question 10 1 pts It is of interest to know if the average time it takes police to reach the scene of an accident differs from that of an ambulance to reach the same accident. Estimate the difference in the times between the police and the ambulance (mean time for police - mean time for ambulance) using a 99% confidence interval. Based on the confidence interval constructed, do the data support the claim that it takes the same amount of time for the police and the ambulance to reach the scene of an accident? Summary data are as follows: sample size sample mean sample variance Police 60 4.2 minutes 0.08 Ambulance 55 4.5 minutes 0.10 Q 99% CI. is (-0.445, -0.155). The sample supports that the times differ. 99% CI. is (-0.445, -0.155). The sample does not support that the times differ. Q 99% CI. is (-1.070, 0.471). The sample supports that the times differ. O 99%% CI. is (-1.070, 0.471). The sample does not supports that the times differ.D Question 11 1 pts A customer service representative was interested in comparing the average time (in minutes) customers are placed on hold when calling Southern California Edison (SCE) and Southern California Gas (SCG) companies. The representative obtained two independent random samples and calculated the following summary information: SCE SCG Sample Size 9 12 Sample Mean 3.2 minutes 2.8 minutes Sample Standard Deviation 0.5 minutes 0.7 minutes Test whether there is a significant difference in average time a customer is on hold between the two companies, at the level of significance 0.1. O Since 0.1 -2.13, we do not have enough evidence to conclude that the time management program has been effective in increasing production. " Since Tam #-2.82 > -4.604 we do not have enough evidence to conclude that the time management program has been effective in increasing production O Since Tete -2.82