There is growing concern over a possible causal link between consumption of diet soda and obesity. Gallup took in 2013 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 them said that they mostly drink diet soda. The remaining 1106 adults described themselves as about right weight, and 210 of them said that they mostly drink diet soda. Is there evidence at 1% level that the proportions of adults who mostly drink diet soda with overweight and with about right weight are different? Which method will you use to perform the test? Choose the correct one. 1-sample T test 2-sample T test 2-sample Z test. 2-proportion Z test What is the pooled proportion? State the null and alternative hypotheses: Which distribution will you use for your test? Give the test statistic: Find the p-value: Decision and Conclusion:
There is growing concern over a possible causal link between consumption of diet soda and obesity. Gallup took in 2013 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 them said that they mostly drink diet soda. The remaining 1106 adults described themselves as about right weight, and 210 of them said that they mostly drink diet soda. Is there evidence at 1% level that the proportions of adults who mostly drink diet soda with overweight and with about right weight are different?
Which method will you use to perform the test? Choose the correct one.
1-sample T test
2-sample T test
2-sample Z test.
2-proportion Z test
What is the pooled proportion?
State the null and alternative hypotheses:
Which distribution will you use for your test?
Give the test statistic:
Find the p-value:
Decision and Conclusion:
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