What is the chi square result

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Reference no: EM131055898

Two physicians examined results of 50 randomized, double-blind, placebo-controlled trial examining whether patients with chronic fatigue syndrome (CFS) improved 6 weeks after treatment with intramuscular magnesium. The group who received the magnesium were compared to a group who received a placebo and outcome was feeling better.

Physician A believed 15 patients received magnesium as opposed to placebo. Physician B believed 20 patients received magnesium as opposed to placebo. They both agreed on 9 patient cases having received magnesium as opposed to placebo. What is the Chi square result?

Treatment

 

Outcome

 

 

Physician B - Magnesium

Physician B - Placebo

Total

Physician A - Magnesium

9

?

15

Physician A - Placebo

?

?

?

Total

20

?

50

Reference no: EM131055898

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