S-Adenosyl-l-methionine (SAMe) is a dietary supplement used to treat depression.

ID: 2907098 • Letter: S

Question

A study randomly assigned smokers who wanted to quit smoking to one of three groups: a low dose of SAMe, high dose of SAMe, or a placebo.

After 8 weeks of treatment and behavioral smoking cessation intervention, smoking abstinence was assessed biochemically.

Here are the findings:

The component of the chi-square statistic for the cell of subjects abstaining from smoking in the placebo group is about

0.0034.

6.33.

33.337.

0.07.

Abstinent Still smoking TOTALS Placebo 7 33 40 Low-dose SAMe 7 33 40 High-dose SAMe 5 35 40 TOTALS 19 101 120

Expected frequency for cell of subjects abstaining from smoking in the placebo group

= (40*19)/120

= 6.33

Hence,

Chi square component = (7 - 6.33)2 / 6.33 = 0.07

Option D is correct.

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.