Medical Marijuana. An issue with legalization of medical marijuana is “diversion”, the process in which medical marijuana prescribed for one person is given, traded, or sold to someone who is not registered for medical marijuana use. The mean number of days that 116 adolescents in substance abuse treatment used medical marijuana in the last six months was 103.99. Assume the population standard deviation is 32 days. Complete parts

(a) through

(d) below.

a. Find a 95% confidence interval for the mean number of days, μ, of diverted medical marijuana use in the last 6 months of all adolescents in substance abuse treatment.

b. Find a 90% confidence interval for the mean number of days, μ, of diverted medical marijuana use in the last 6 months of all adolescents in substance abuse treatment.

c. Draw a graph to display both confidence intervals.

d. Which confidence interval yields a more accurate estimate of μ?

Explain your answer.