For the following scenario, choose the appropriate statistical test. SCENARIO: In a study about nasal spray vaccine for children, subjects are divided into two groups. In the first group, 1602 children received the vaccine and only 14 of them developed the flu. In the second group, 532 children received a placebo and 95 of them developed the flu. We would like to test the claim that the nasal spray vaccine had no effect. O Chi-Square Goodness-of-Fit O One-Way ANOVA Test O Hypothesis Test for Two Proportions

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A:

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Q: Question 20

A: The formula for pooled variance is as follows:

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Contingency Table

A contingency table can be defined as the visual representation of the relationship between two or more categorical variables that can be evaluated and registered. It is a categorical version of the scatterplot, which is used to investigate the linear relationship between two variables. A contingency table is indeed a type of frequency distribution table that displays two variables at the same time.

Binomial Distribution

Binomial is an algebraic expression of the sum or the difference of two terms. Before knowing about binomial distribution, we must know about the binomial theorem.