The 1948 and 2018 temperatures at 197 random locations across the globe were compared and the mean difference for the number of days above 90 degrees was found to be 2.9 days with a standard deviation of 17.2 days. The difference in days at each location was found by subtracting 1948 days above 90 degrees from 2018 days above 90 degrees

D) Does the 90% confidence interval provide evidence that number of 90 degree days Choose... increased globally comparing 1948 to 2018? Why? E) Does the 99% confidence interval provide evidence that number of 90 degree days Choose... increased globally comparing 1948 to 2018? Why? F) If the mean difference and standard deviation stays relatively constant would decreasing the degrees of freedom make it easier or Choose... harder to conclude that there are more days above 90 degrees in 2018 versus 1948 globally. G) If the mean difference and standard deviation stays relatively constant does lowering the confidence level make Choose... it easier or harder to conclude that there Time left 0:57:31 X