Thirty-three percent of children and teens in the United States are obese or overweight (Health, October 2010). A health practitioner in the Midwest collects data on 200 children and teens and finds that 84 of them are either obese or overweight.
a. The health practitioner believes that the proportion of obese and overweight children in the Midwest is not representative of the national proportion. Specify the competing hypotheses to test her claim.
b. Calculate the value of the test statistic and the p-value.
c. At the 1% significance level, do the sample data support the health practitioner’s belief?
