taller 6

A) Define and provide examples:

Categorical variable
Cross-tabulation table
Unadjusted odds ratio
Statistical significance
Chi-square statistic
Yate’s continuity correlation
Fisher’s exact test
McNemar test

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B) Is the vaccine effective? In a USA Today article about an experimental vaccine for children, the following statement was presented:

“In a trial involving 1602 children only 14 (1%) of the 1070 who received the vaccine developed the flu, compared with 95 (18%) of the 532 who got a placebo”

The data are shown in the table below. Use a 0.05 significance level to test for independence between the variable of treatment (vaccine or placebo) and the variable representing flu (developed flu, did not develop flu).

Does the vaccine appear to be effective?




Developed flu?





































(taken from textbook Elementary Statistics by Mario Triola 10th Edition)

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