For a new study conducted by a fitness magazine,240 females were randomly selected. For each, the mean daily calorie consumption was calculated for a September-February period. A second sample of290females was chosen independently of the first. For each of them, the mean daily calorie consumption was calculated for a March-August period. During the September-February period, participants consumed a mean of2389.1 calories daily with a standard deviation of170. During the March-August period, participants consumed a mean of2410.9calories daily with a standard deviation of222.5. The population standard deviations of daily calories consumed for females in the two periods can be estimated using the sample standard deviations, as the samples that were used to compute them were quite large. Construct a90%confidence interval for12, the difference between the mean daily calorie consumption1of females in September-February and the mean daily calorie consumption2of females in March-August. Then complete the table below.

Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places.

What is the lower limit of the 90% confidence interval?

What is the upper limit of the 90% confidence interval?