In a study, the mean number of days that 160 adolescents in substance abuse treatment used medical marijuana in the last 6 months was 112.52. Assuming the population standard deviation is 28 days, a 90% confidence interval for the mean number of days. H. of medical marijuana use in the last 6 months of all adolescents in substance abuse treatment is from 108.88 days to 116.16 days; this interval's margin of error is 3.64 days. Complete parts (a) through (d) below: Click here to view page 1 of the table of areas under the standard normal curve Click here to view page 2 of the table of areas under the standard normal curve a. The mean number of days that 40 adolescents in substance abuse treatment used medical marijuana in the last 6 months was 109.17 Find a 90% confidence interval for p based on that data. The 90% confidence interval is from day(s) to day(s), (Round to two decimal places as needed)