(Solved): For a group of 22 children that were injured in a car accident and were wearing a seatbelt, the num ...

For a group of 22 children that were injured in a car accident and were wearing a seatbelt, the number of days that they were in the hospital has a mean of 0.83 days, and a standard deviation of 1.77. For a group of 290 children that were injured in a car accident and were not wearing a seatbelt, the number of days that they were in the hospital has a mean of 1.39 days, and a standard deviation of 3.06. Use a 0.05 significance level to test the claim that children wearing a seatbelt have a lower mean time in the hospital than the mean of the children not wearing a seatbelt. Assume that data is not pooled.