a) What percent of patients in the treatment group were pain free 24 hours after receiving acupuncture? b) What percent of patients in the control group were pain free after 24 hours? % c) At first glance, does acupuncture appear to be an effective treatment for migraines? Explain your reasoning.

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A migraine is a particularly painful type of headache, which
patients sometimes wish to treat with acupuncture. To
determine whether acupuncture relieves migraine pain,
researchers conducted a randomized controlled study where
89 females diagnosed with migraine headaches were
randomly assigned to one of two groups: treatment or
control. 43 patients in the treatment group received
acupuncture that is specifically designed to treat migraines.
46 patients in the control group received placebo
acupuncture (needle insertion at non-acupoint locations). 24
hours after patients received acupuncture, they were asked
if they were pain free. Results are summarized in the
contingency table below (Allais, 2011).
(round answers to 2 decimal places)
Pain Free: Yes
Pain Free: No
Total
Treatment
10
33
43
Control
2
44
46
Total
12
77
89
a) What percent of patients in the treatment group were pain
free 24 hours after receiving acupuncture?
b) What percent of patients in the control group were pain
free after 24 hours?
c) At first glance, does acupuncture appear to be an
effective treatment for migraines? Explain your reasoning.
yes, because more individuals in the treatment group
were pain-free after 24 hours
no, because more than half of the individuals in the
treatment group still experience pain 24 hours later
no, because there were fewer people in the
treatment group
yes, because a higher percentage of individuals in the
treatment group were pain-free after 24 hours
Transcribed Image Text:A migraine is a particularly painful type of headache, which patients sometimes wish to treat with acupuncture. To determine whether acupuncture relieves migraine pain, researchers conducted a randomized controlled study where 89 females diagnosed with migraine headaches were randomly assigned to one of two groups: treatment or control. 43 patients in the treatment group received acupuncture that is specifically designed to treat migraines. 46 patients in the control group received placebo acupuncture (needle insertion at non-acupoint locations). 24 hours after patients received acupuncture, they were asked if they were pain free. Results are summarized in the contingency table below (Allais, 2011). (round answers to 2 decimal places) Pain Free: Yes Pain Free: No Total Treatment 10 33 43 Control 2 44 46 Total 12 77 89 a) What percent of patients in the treatment group were pain free 24 hours after receiving acupuncture? b) What percent of patients in the control group were pain free after 24 hours? c) At first glance, does acupuncture appear to be an effective treatment for migraines? Explain your reasoning. yes, because more individuals in the treatment group were pain-free after 24 hours no, because more than half of the individuals in the treatment group still experience pain 24 hours later no, because there were fewer people in the treatment group yes, because a higher percentage of individuals in the treatment group were pain-free after 24 hours
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