Question

A study was made of seat belt use among children who were involved in car crashes that caused them to be hospitalized. It was found that children not wearing any restraints had hospital stays with a mean of 7.37 days and a standard deviation of 1.50 days with an approximately normal distribution.

(a) Find the probability that their hospital stay is from 5 to 6 days, rounded to five decimal places.

(b) Find the probability that their hospital stay is greater than 6 days, rounded to five decimal places.

Answer 1

Here it is given that distribution is normal with mean=7.37 and standard deviation is 1.50

a. Here we need to find

As distribution is normal we can convert x to z

b. Here we need to find

Hence are the correct answers.