Question

A study was conducted to test whether marijuana use impacts your short-term memory. A simple random sample of college students that do NOT use marijuana was taken, and given a memory test in which they were shown items in a particular order then asked to recreate that ordering. A second simple random sample was taken of college students that use marijuana 4 - 7 days per week, and they were given the same memory test.

A higher score on the memory test indicates better memory recall.

μ 1 indicates the population mean memory recall score for non-users.

μ 2 indicates the population mean memory recall score for marijuana users. The 99% confidence interval for the difference of means was found to be:

7.6 < μ 1 − μ 2 < 21

Can we support the claim that marijuana users have less short-term memory than non-users?

Yes No

Please explain why or why not

Answer 1