you are asked to do a study on patients with MS to determine whether there is a

Question

you are asked to do a study on patients with MS to determine whether there is a difference in muscle spasticity for those who smoke THC vs those who dont smoke THC. You select an alpha of 0.05 and a power of 0.80. Your p-value is 0.08, what should you conclude?

a. there is a difference in muscle spasticity in those who use THC vs. those who do not

b. there is no difference in the amount of muscle spasticity b/w the two groups

c. THC is associated with decreased muscle spasticity

d. THC is associated with increased muscle spasticity

- you are conducting a cohort study of 153 people at risk of cancer. There are 25 new cases found during your study. What is your incidence rate?

18.4%

15.6%

6.12%

16.3%

- there is a relative risk of 1.98. You conclude the exposure of intereszt ia a(n):

a. Significant protective effect

b. insignificant protective effect

c. significant risk factor

d. insignificant risk factor

- a study is conducted with the age of a person and the likelihood to get STDs. The p - value for chi squared is 0.02 (assume alpha = .05). You can conclude:

a. there is no association b/w age and likehood

b. Older people dont get STDs

c. There is an association

d. You cant conclude anything

Explanation / Answer

1.

b. there is no difference in the amount of muscle spasticity b/w the two groups (p-value > alpha)

2.

=25/153 = 16.3 %

3. insignificant protective effect

4.

a. there is no association b/w age and likehood (p-value < alpha)

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