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The Director of Student Health Services Wishes to Know If

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The Director of Student Health Services wishes to know if her anti-smoking campaign has been effective. Last year, a complete survey of all students found the mean number of cigarettes smoked per day by students to be 8.6 with a standard deviation of 2.0. The Director of the Student Health Service obtains the following results from a recently selected random sample of students (in cigarettes smoked per day):
The Director of Student Health Services wishes to know if her anti-smoking campaign has been effective. Last year, a complete survey of all students found the mean number of cigarettes smoked per day by students to be 8.6 with a standard deviation of 2.0. The Director of the Student Health Service obtains the following results from a recently selected random sample of students (in cigarettes smoked per day): (a)Set up and (b)Perform the statistical test ( (c)Draw final conclusions.
(a)Set up
The Director of Student Health Services wishes to know if her anti-smoking campaign has been effective. Last year, a complete survey of all students found the mean number of cigarettes smoked per day by students to be 8.6 with a standard deviation of 2.0. The Director of the Student Health Service obtains the following results from a recently selected random sample of students (in cigarettes smoked per day): (a)Set up and (b)Perform the statistical test ( (c)Draw final conclusions.
and
The Director of Student Health Services wishes to know if her anti-smoking campaign has been effective. Last year, a complete survey of all students found the mean number of cigarettes smoked per day by students to be 8.6 with a standard deviation of 2.0. The Director of the Student Health Service obtains the following results from a recently selected random sample of students (in cigarettes smoked per day): (a)Set up and (b)Perform the statistical test ( (c)Draw final conclusions.
(b)Perform the statistical test (
The Director of Student Health Services wishes to know if her anti-smoking campaign has been effective. Last year, a complete survey of all students found the mean number of cigarettes smoked per day by students to be 8.6 with a standard deviation of 2.0. The Director of the Student Health Service obtains the following results from a recently selected random sample of students (in cigarettes smoked per day): (a)Set up and (b)Perform the statistical test ( (c)Draw final conclusions.
(c)Draw final conclusions.

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