Question

According to the Center for Disease Control (CDC), the percent
of adults 20 years of age and over in the United States who are
overweight is 69%. One city’s council wants to know if the
proportion of overweight citizens in their city is different from
this known national proportion. They take a random sample of 150
adults 20 years of age or older in their city and find that 98 are
classified as overweight. **At the 4% level of significance,
test the original claim.****Apply two-sided
test**, and give all six steps of the procedure clearly.
Finally interpret the conclusion in terms of the example.

Answer #1

For any query in above, comment

According to the Center for Disease Control, 49.4% of American
adults 18 years old and over meet their guidelines for physical
activity. A sporting goods company claims that the proportion of
their employees who meet these guidelines is higher than the
national result. They took a random sample of 400 employees and 218
met the guidelines. Test the company’s claim using the ? = 0.05
level of significance.

In a prior sample of U.S. adults, the Center for Disease Control
(CDC), found that 10% of the people in this sample had pinworm but
the margin of error for the population estimate was too large. They
want an estimate that is in error by no more than 1.5 percentage
points at the 95% confidence level. Enter your answers as
whole numbers.
(a) What is the minimum sample size required to obtain this type
of accuracy? Use the prior sample...

Pinworm: USE SOFTWARE In a prior sample of U.S.
adults, the Center for Disease Control (CDC), found that 8% of the
people in this sample had pinworm but the margin of error for the
population estimate was too large. They want an estimate that is in
error by no more than 2.5 percentage points at the 90% confidence
level. Enter your answers as whole numbers.
(a) What is the minimum sample size required to obtain this type
of accuracy? Use...

According to the Center for Disease Control and Prevention, in
2015, about 15% of US adults aged 18 years or older smoked
cigarettes. A recent survey of 252 undergraduate students from
Texas State University shows that 20 students smoke at least one
cigarette per week. Texas State campus became tobacco- free in
August 2011. Does the smoking ban actually work? Perform the test
of hypothesis using significance level alpha .02
What is the decision and state conclusion in terms of...

A research report from the Center for Disease Control (CDC)
showed that 49.4% of Americans aged 18+ years meet their Physical
Activity Guidelines for aerobic physical activity. A random sample
of 41 members of a national gym chain found that 28 met the CDC’s
guidelines.
Test at the 0.01 level whether the percentage of their gym
members meeting the guidelines is better.
Do the results of your test place the gym chain in a favorable
or unfavorable light? Explain.
Describe...

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 sample of 2185 is taken with a margin of error of .02 by using
95% confidence. The sample size recommendation of 2185 finds 520
smokers. A point estimate of the proportion...

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.
2124...

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 (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 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 (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 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 .30.
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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