Question

Suppose a group of 1000 smokers (who all wanted to give up smoking) were randomly assigned to receive an antidepressant drug or a placebo for six weeks. Of the 273 patients who received the antidepressant drug, 42 were not smoking one year later. Of the 727 patients who received the placebo, 22 were not smoking one year later. Given the null hypothesis H0:(pdrug−pplacebo)=0H0:(pdrug−pplacebo)=0 and the alternative hypothesis Ha:(pdrug−pplacebo)≠0Ha:(pdrug−pplacebo)≠0, conduct a test to see if taking an antidepressant drug can help smokers stop smoking. Use α=0.02α=0.02,

(a) The test statistic is

(b) The P-value is

Answer #1

(1 point) Suppose a group of 700 smokers (who all wanted to give
up smoking) were randomly assigned to receive an antidepressant
drug or a placebo for six weeks. Of the 139 patients who received
the antidepressant drug, 30 were not smoking one year later. Of the
561 patients who received the placebo, 107 were not smoking one
year later. Given the null hypothesis
H0:(pdrug−pplacebo)=0H0:(pdrug−pplacebo)=0 and the alternative
hypothesis Ha:(pdrug−pplacebo)≠0Ha:(pdrug−pplacebo)≠0, conduct a
test to see if taking an antidepressant drug...

Suppose a group of 900 smokers (who all wanted to give up
smoking) were randomly assigned to receive an antidepressant drug
or a placebo for six weeks. Of the 152 patients who received the
antidepressant drug, 36 were not smoking one year later. Of the 748
patients who received the placebo, 189 were not smoking one year
later. Given the null hypothesis H0:(pdrug−pplacebo)=0 and the
alternative hypothesis Ha:(pdrug−pplacebo)≠0, conduct a test to see
if taking an antidepressant drug can help...

Suppose a group of 700 smokers (who all wanted to give up
smoking) were randomly assigned to receive an antidepressant drug
or a placebo for six weeks. Of the 195 patients who received the
antidepressant drug, 90 were not smoking one year later. Of the 505
patients who received the placebo, 170 were not smoking one year
later. Given the null hypothesis H0:(pdrug−pplacebo)=0 and the
alternative hypothesis Ha:(pdrug−pplacebo)≠0, conduct a test to see
if taking an antidepressant drug can help...

Suppose a group of 800 smokers (who all wanted to give up
smoking) were randomly assigned to receive an antidepressant drug
or a placebo for six weeks. Of the 543 patients who received the
antidepressant drug, 221 were not smoking one year later. Of the
257 patients who received the placebo, 42 were not smoking one year
later. Given the null hypothesis
H0:(pdrug−pplacebo)=0
and the alternative hypothesis
Ha:(pdrug−pplacebo)≠0,
conduct a test to see if taking an antidepressant drug can help...

Suppose a group of 900 smokers (who all wanted to give up
smoking) were randomly assigned to receive an antidepressant drug
or a placebo for six weeks. Of the 190 patients who received the
antidepressant drug, 66 were not smoking one year later. Of the 710
patients who received the placebo, 322 were not smoking one year
later. Given the null hypothesis H0:(pdrug−pplacebo)=0 H 0 : ( p d
r u g − p p l a c e b...

Suppose a group of 700 smokers (who all wanted to give up
smoking) were randomly assigned to receive an antidepressant drug
or a placebo for six weeks. Of the 207 patients who received the
antidepressant drug, 31 were not smoking one year later. Of the 493
patients who received the placebo, 123 were not smoking one year
later. Given the null hypothesis ?0:(?????−????????)=0 and the
alternative hypothesis ??:(?????−????????)≠0, conduct a test to see
if taking an antidepressant drug can help...

Suppose a group of 700 smokers (who all wanted to give up
smoking) were randomly assigned to receive an antidepressant drug
or a placebo for six weeks. Of the 260 patients who received the
antidepressant drug, 88 were not smoking one year later. Of the 440
patients who received the placebo, 172 were not smoking one year
later.
Given the null hypothesis H0:(p-drug ? p-placebo)=0 and the
alternative hypothesis Ha:(p-drug ? p-placebo)?0
conduct a test to see if taking an...

In one study of smokers who tried to quit smoking with nicotine
patch therapy, 38 were smoking one year after treatment and 34
were not smoking one year after the treatment. Use a 0.10
significance level to test the claim that among smokers who try to
quit with nicotine patch therapy, the majority are smoking one
year after the treatment. Do these results suggest that the
nicotine patch therapy is not effective?
Identify the null and alternative hypotheses for this...

A study examined parental influence on teenagers' decisions to
smoke. A group of students who had never smoked were questioned
about their parents' attitudes toward smoking. These students were
questioned again two years later to see if they had started
smoking. The researchers found that, among the 273 students who
indicated that their parents disapproved of kids smoking, 71 had
become established smokers. Among the 35 students who initially
said their parents were lenient about smoking, 15 became smokers.
Do...

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