In a study, the mean number of days that 148 adolescents in substance abuse treatment used medical marijuana in the last 6 months was 114.83. Assuming the population standard K deviation is 33 days, a 90% confidence interval for the mean number of days, u, of medical marijuana use in the last 6 months of all adolescents in substance abuse treatment is from 110.37 days to 119.29 days; this interval's margin of error is 4.46 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 37 adolescents in substance abuse treatment used medical marijuana in the last 6 months was 111.38. Find a 90% confidence interval for based on that data. The 90% confidence interval is from | day(s) to day(s). (Round to two decimal places as needed.) b. Compare the 90% confidence intervals obtained in part (a) and in the original study by drawing a graph. Choose the correct graph below. O A. OB. O 90% Cl for p 90% Cl for p (n = 148) (n = 148) 90% Cl for p 90% Cl for u (n = 37) (n = 37) 100 112 124 108 114 120 O C. O OD. O 90% Cl for p 90% Cl for p (n= 148) A (n=148) A Next f ENG RX O 10:13 AM IN 11/10/2022 3