o 125.15 days; this inte der the standard norma der the standard norma

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In a study, the mean number of days that 124 adolescents in substance abuse treatment used medical marijuana in the last 5 months was 119.17. Assuming the
population standard deviation is 34 days, a 95% confidence interval for the mean number of days, µ, of medical marijuana use in the last 5 months of all adolescents in
substance abuse treatment is from 113.19 days to 125.15 days; this interval's margin of error is 5.98 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 31 adolescents in substance abuse treatment used medical marijuana in the last 5 months was 115.54. Find a 95% confidence interval
for
based on that data.
The 95% confidence interval is from
day(s) to
day(s).
(Round to two decimal places as needed.)
Transcribed Image Text:| 8.2.81 Question Help In a study, the mean number of days that 124 adolescents in substance abuse treatment used medical marijuana in the last 5 months was 119.17. Assuming the population standard deviation is 34 days, a 95% confidence interval for the mean number of days, µ, of medical marijuana use in the last 5 months of all adolescents in substance abuse treatment is from 113.19 days to 125.15 days; this interval's margin of error is 5.98 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 31 adolescents in substance abuse treatment used medical marijuana in the last 5 months was 115.54. Find a 95% confidence interval for based on that data. The 95% confidence interval is from day(s) to day(s). (Round to two decimal places as needed.)
9.4.77-P
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A sample mean, sample size, and population standard deviation are provided below. Use the one-mean z-test to perform the required hypothesis test at the 5%
significance level.
x = 28, n = 37, o = 5, Ho: µ = 31, Hạ:H<31
The test statistic is z = - 3.65 .
(Round to two decimal places as needed.)
The P-value is.
(Round to three decimal places as needed.)
Transcribed Image Text:9.4.77-P Question Help A sample mean, sample size, and population standard deviation are provided below. Use the one-mean z-test to perform the required hypothesis test at the 5% significance level. x = 28, n = 37, o = 5, Ho: µ = 31, Hạ:H<31 The test statistic is z = - 3.65 . (Round to two decimal places as needed.) The P-value is. (Round to three decimal places as needed.)
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