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Find the expected frequency for contingency table

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Reference no: EM131361630

Find the expected frequency for the given Contingency Table, where the Observed frequency is 88 and 10. Use a 0.05 significance level to test the claim that getting an infection (cold) is independent of the treatment group. What does the result indicates about the effectiveness of Echinacea as a treatment for colds?

Treatment Group

Placebo

Echinacea:20%extract

Echinacea:60%extract

Infected

88

48

42

Not Infected

15

4

10

Reference no: EM131361630

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