There Is Growing Concern Over a Possible Causal Link Between

Multiple Choice

There is growing concern over a possible causal link between consumption of diet soda and obesity. In 2013, Gallup took a nationally representative sample of 2027 adults and asked them about their soda consumption. In the sample, 921 adults described themselves as overweight, and 295 of those individuals also said that they mostly drink diet soda. The remaining 1106 adults described themselves as about the right weight, and 210 of those individuals also said that they mostly drink diet soda. We plan to test the following hypotheses about diet soda consumption:
H₀:p_Overweight = p_{About right}, Ha:p_Overweight ≠ p_{About right}
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What is the pooled proportion of individuals who mostly drink diet soda?

A) 0.1899
B) 0.2491
C) 0.3203
D) 0.5000