THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

Multiple Choice

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
A restaurant manager was in charge of purchasing new microwaves for his restaurant.The choices were narrowed to two available models.Since the two models cost about the same,the manager was interested in determining whether there was a difference in the amount of power consumed when operated at high voltages.Based on two independent random samples,the following summary information was computed:

-Find a 99% confidence interval for the difference in the amount of power consumed at high voltages by the two models.

A) 0.2 ± 0.86
B) 0.2 ± 0.58
C) 0.2 ± 0.64
D) 0.2 ± 0.77