Who could help me please I need help

qenatba onyy
timer Asked: May 18th, 2015

Question Description


Unformatted Attachment Preview

Part Two: Answer all questions: (40 points) 1) Many studies have been conducted to test the effects of marijuana use on mental abilities. In one such study, group of light and heavy users of marijuana in college were tested for memory recall, with the results given below (Based on Journal of American Medical Association): = 12.96 2 Items sorted correctly by light marijuana users: N2 = 64, Xı = 53.3, si Items sorted correctly by heavy marijuana users: n2 = 65, X = 51.3, sz = 20.25 a) Use a 0.01 significance level to test the claim that the population of heavy marijuana users has a lower mean than the light users. (Clearly show the steps of the hypothesis test). (i) Null & alternative hypotheses: Ho: Ha: (ii) Value of the test statistic: t: X, X2 53.3 -51.3 tz S. ✓ s2 + S₂² 12.96 + 20.25 2 62 nz 65 4.756 (iii) p-value: < p < (iv) Conclusion: The result is significant at PL 6.05 b) Should marijuana use be of concern to college students based on your test? Explain.
User generated content is uploaded by users for the purposes of learning and should be used following Studypool's honor code & terms of service.

This question has not been answered.

Create a free account to get help with this and any other question!

Related Tags

Brown University





1271 Tutors

California Institute of Technology




2131 Tutors

Carnegie Mellon University




982 Tutors

Columbia University





1256 Tutors

Dartmouth University





2113 Tutors

Emory University





2279 Tutors

Harvard University





599 Tutors

Massachusetts Institute of Technology



2319 Tutors

New York University





1645 Tutors

Notre Dam University





1911 Tutors

Oklahoma University





2122 Tutors

Pennsylvania State University





932 Tutors

Princeton University





1211 Tutors

Stanford University





983 Tutors

University of California





1282 Tutors

Oxford University





123 Tutors

Yale University





2325 Tutors