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
