1. A study of seat belt use involved children who were hospitalized after motor vehicle crashes. For a group of 123 children who were wearing seat belts, the number of days in intensive care units (ICU) has a mean of 0.83 and a standard deviation of 1.77. Fora group of 290 children who were not wearing seat belts, the number of days spent in ICUs has a mean of 1.39 and a standard deviation of 3.06 (based on data from some recorded research findings} a. Us a 0.05 significance level to test the claim that children wearing seat belts have a lower mean length of time in an ICU than the mean for children not wearing seat belts. [Hint: STAT - -)TESTS --)2-Sample1Test, and then complete the required statistics] b. Construct a confidence interval appropriate for the hypothesis test in part (a). [Hint: STAT - ->TESTS --> 2-SampTint, and then complete the required statistics]