National Firearms Survey. Refer to the Harvard School of Public Health survey to determine the size and composition of privately held firearm stock in the United States, presented in Exercise. Recall that, in a representative household telephone survey of 2,770 adults, 26% reported that they own at least one gun ( Injury Prevention , Jan. 2007). The researchers want to estimate the true percentage of adults in the United States that own at least one gun.
a. Identify the population of interest to the researchers.
b. Identify the parameter of interest to the researchers.
c. Compute an estimate of the population parameter.
d. Form a 99% confidence interval around the estimate.
e. Interpret the confidence interval practically.
f. Explain the meaning of the phrase “99% confident.”
National firearms survey. The Harvard School of Public Health conducted a study of privately held firearm stock in the United States. In a representative household telephone survey of 2,770 adults, 26% reported that they own at least one gun (Injury Prevention, Jan. 2007). Of those that own a gun, 5% own a handgun. Suppose one of the 2,770 adults surveyed is randomly selected.
a. What is the probability that the adult owns at least one gun?
b. What is the probability that the adult owns at least one gun and the gun is a handgun?
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