Question
In: Statistics and Probability
The Centers for Disease Control reported the percentage of people 18 years of age and older...
The Centers for Disease Control reported the percentage of people 18 years of age and older who smoke (CDC website, December 14, 2014). Suppose that a study designed to collect new data on smokers and nonsmokers uses a preliminary estimate of the proportion who smoke of .29. a. How large a sample should be taken to estimate the proportion of smokers in the population with a margin of error of .02 (rounded up to the next whole number)? Use 95% confidence. b. Assume that the study uses your sample size recommendation in part (a) and finds 520 smokers. What is the point estimate of the proportion of smokers in the population (to 4 decimals)? c. What is the 95% confidence interval for the proportion of smokers in the population (to 4 decimals)?
Solutions
orchestra answered 2 years agoRelated Solutions
The Centers for Disease Control reported the percentage of people 18 years of age and older...
The Centers for Disease Control reported the percentage
of people 18 years of age and older who smoke (CDC website,
December 14, 2014). Suppose that a study designed to collect new
data on smokers and nonsmokers uses a preliminary estimate of the
proportion who smoke of .32.
a. How large a sample should be taken to estimate the proportion
of smokers in the population with a margin of error of .02 (rounded
up to the next whole number)? Use 95%...
The Centers for Disease Control reported the percentage of people 18 years of age and older...
The Centers for Disease Control reported the percentage of
people 18 years of age and older who smoke (CDC website, December
14, 2014). Suppose that a study designed to collect new data on
smokers and nonsmokers uses a preliminary estimate of the
proportion who smoke of .32. a. How large a sample should be taken
to estimate the proportion of smokers in the population with a
margin of error of .02 (to the nearest whole number)? Use 95%
confidence. b....
The Centers for Disease Control reported the percentage of people 18 years of age and older...
The Centers for Disease Control reported the percentage of
people 18 years of age and older who smoke (CDC website, December
14, 2014). Suppose that a study designed to collect new data on
smokers and nonsmokers uses a preliminary estimate of the
proportion who smoke of .33.
a. How large a sample should be taken to estimate the proportion
of smokers in the population with a margin of error of .02 (to the
nearest whole number)? Use 95% confidence.
b....
The Centers for Disease Control reported the percentage of people 18 years of age and older...
The Centers for Disease Control reported the percentage of
people 18 years of age and older who smoke (CDC website, December
14, 2014). Suppose that a study designed to collect new data on
smokers and nonsmokers uses a preliminary estimate of the
proportion who smoke of .27.
a. How large a sample should be taken to estimate the proportion
of smokers in the population with a margin of error of .02 (to the
nearest whole number)? Use 95% confidence.
b....
The Centers for Disease Control reported the percentage of people 18 years of age and older...
The Centers for Disease Control reported the percentage
of people 18 years of age and older who smoke (CDC website,
December 14, 2014). Suppose that a study designed to collect new
data on smokers and nonsmokers uses a preliminary estimate of the
proportion who smoke of .34.
a. How large a sample should be taken to estimate the proportion
of smokers in the population with a margin of error of .02 (rounded
up to the next whole number)? Use 95%...
The Centers for Disease Control reported the percentage of people 18 years of age and older...
The Centers for Disease Control reported the percentage of
people 18 years of age and older who smoke (CDC website, December
14, 2014). Suppose that a study designed to collect new data on
smokers and nonsmokers uses a preliminary estimate of the
proportion who smoke of .31. a. How large a sample should be taken
to estimate the proportion of smokers in the population with a
margin of error of .02 (rounded up to the next whole number)? Use
95%...
The Centers for Disease Control reported the percentage of people 18 years of age and older...
The Centers for Disease Control reported the percentage of
people 18 years of age and older who smoke (CDC website, December
14, 2014). Suppose that a study designed to collect new data on
smokers and nonsmokers uses a preliminary estimate of the
proportion who smoke of .28.
a. How large a sample should be taken to estimate the proportion
of smokers in the population with a margin of error of .02 (rounded
up to the next whole number)? Use 95%...
The Centers for Disease Control reported the percentage of people 18 years of age and older...
The Centers for Disease Control reported the percentage of
people 18 years of age and older who smoke (CDC website, December
14, 2014). Suppose that a study designed to collect new data on
smokers and nonsmokers uses a preliminary estimate of the
proportion who smoke of .29.
a. How large a sample should be taken to estimate the proportion
of smokers in the population with a margin of error of .02 (rounded
up to the next whole number)? Use 95%...
The Centers for Disease Control reported the percentage of people 18 years of age and older...
The Centers for Disease Control reported the percentage of
people 18 years of age and older who smoke (CDC website, December
14, 2014). Suppose that a study designed to collect new data on
smokers and nonsmokers uses a preliminary estimate of the
proportion who smoke of .35.
a. How large a sample should be taken to estimate the proportion
of smokers in the population with a margin of error of .02 (to the
nearest whole number)? Use 95% confidence.
b....
The Centers for Disease Control reported the percentage of people 18 years of age and older...
The Centers for Disease Control reported the percentage
of people 18 years of age and older who smoke (CDC website,
December 14, 2014). Suppose that a study designed to collect new
data on smokers and nonsmokers uses a preliminary estimate of the
proportion who smoke of .28.
a. How large a sample should be taken to estimate the proportion
of smokers in the population with a margin of error of .02 (to the
nearest whole number)? Use 95% confidence.
b....
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