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The CDC periodically administers large randomized surveys to track the health of Americans. In a survey of...

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Statistics

The CDC periodically administers large randomized surveys totrack the health of Americans.
In a survey of 4378 adults ending in 2016, 70.9% were overweight,and
in a survey of 4246 adults ending in 2012, 68.7% wereoverweight.

(a) The standard error for estimating the change in populationproportion is 0.009888.
Calculate the 95% confidence interval for the change in populationproportion
to 4 decimal accuracy: [ x.xxxx, x.xxxx ]

(b) Test the hypothesis that the population proportions are equalvs the two-sided alternative hypothesis.
Calculation accuracy required:
Test statistic: 4 decimals x.xxxx
p-value: 4 decimals 0.xxxx

Answer & Explanation Solved by verified expert
4.0 Ratings (524 Votes)
a The z critical 196the difference in proportions 0709 0687 0022The lower Limit 0022 196 0009888 0022 00194 00026The Upper Limit 0022 196 0009888 0022 00194 00414The 95 CI is 00026    See Answer
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