Question

A study is made of residents in portland and its suburbs concerning the proportion of residents who subscribe to HBO. A random sample of 88 urban residents showed that 12 subscribed, and a random sample of 97 suburban residents showed that 18 subscribed. Does this indicate that a higher proportion of suburban residents subscribe to HBO? Use a 5% level of significance.

a. State the null and alternative hypotheses ?0: ?1:

b. What calculator test will you use? List the requirements that must be met to use this test, and indicate whether the conditions are met in this problem.

c. Run the calculator test and obtain the P-value.

d. Based on your P-value, will you reject or fail to reject the null hypothesis?

e. Interpret your conclusion from part d in the context of this problem

Answer #1

A study is made of residents in Phoenix and its suburbs
concerning the proportion of residents who subscribe to
Sporting News. A random sample of n1 = 86 urban
residents showed that r1 = 14 subscribed, and a random
sample of n2 = 97 suburban residents showed that
r2 = 20 subscribed. Does this indicate that a higher
proportion of suburban residents subscribe to Sporting
News? Use a 5% level of significance.
What is the value of the sample test...

A study is made of residents in Phoenix and its suburbs
concerning the proportion of residents who subscribe to Sporting
News. A random sample of 88 urban residents showed that 13
subscribed, and a random sample of 96 suburban residents showed
that 20 subscribed. Does this indicate that a higher proportion of
suburban residents subscribe to Sporting News? Use a 1% level of
significance. What are we testing in this problem? paired
difference single proportion difference of proportions difference
of...

A study is made of residents in Phoenix and its suburbs
concerning the proportion of residents who subscribe to Sporting
News. A random sample of n1 = 90 urban residents showed that r1 =
10 subscribed, and a random sample of n2 = 99 suburban residents
showed that r2 = 18 subscribed. Does this indicate that a higher
proportion of suburban residents subscribe to Sporting News? Use a
5% level of significance. What are we testing in this problem?
single...

One urban affairs sociologist claims that the proportion,
p
, of adult residents of a particular city who have been
victimized by a criminal is at least
55%
. A random sample of
245
adult residents of this city were questioned, and it was found
that
119
of them had been victimized by a criminal. Based on these data,
can we reject the sociologist's claim at the
0.05
level of significance?
Perform a one-tailed test. Then fill in the table...

Researchers tested 150 farm-raised salmon for organic
contaminants. They found the mean concentration of the carcinogenic
insecticide mirex to be 0.0913 parts per million, with a sample
standard deviation of 0.0495 ppm. Test, using a 1% level of
significance, the claim that the mean concentration of mirex in
farm-raised salmon is below the EPAs recommended limit of 0.08
ppm.
a. State the null and alternative hypotheses
?0:
?1:
b. What calculator test will you use? List the requirements that
must...

_____ According to the National Highway and Traffic Safety
Administration, the proportion of fatal traffic accidents in the
U.S. in which the driver had a positive blood alcohol concentration
(BAC) is 0.36. Suppose a random sample of 105 traffic fatalities in
the state of Hawaii results in 41 that involved a positive BAC.
Does the sample evidence suggest that Hawaii has a higher
proportion of traffic fatalities involving a positive BAC than the
general U.S.? Test at the 0.05 level...

Political Science: Voters This problem is based on information
taken from The Rating Guide to Life in America’s Fifty States, by
G.S. Thomas. A random sample of n1= 288 voters registered in the
state of California showed that 141 voted in the last general
election. A random sample of n2= 216 registered voters in the state
of Colorado showed that 125 voted in the most recent general
election. Do these data indicate that the population proportion of
voter turnout in...

Proportion Problem. Each year Delta Dental does
a survey of parents concerning the tradition of the Tooth Fairy. A
random sample of 1,058 parents were asked about how much money they
leave for a tooth and questions concerning how their child
responded to the concept of the Tooth Fairy. In one question, 508
parents indicated that their child saved the money they got for
their tooth.
You are asked to Test to see if this proportion is different
from .5....

Suppose that 73.2% of all adults with type 2 diabetes also
suffer from hypertension. After developing a new drug to treat type
2 diabetes, a team of researchers at a pharmaceutical company
wanted to know if their drug had any impact on the incidence of
hypertension for diabetics who took their drug. The researchers
selected a random sample of 1000 participants who had been taking
their drug as part of a recent large-scale clinical trial and found
that 718 suffered...

Let the random variable p indicate the population
proportion of people who plan to vote for Donald Trump in the
upcoming election. In a sample of 50 people, you find the sample
proportion of people who plan to vote for Donald Trump
is p ^ = .45.
Construct a 95% confidence interval for p, the true
proportion of people who plan to vote for Donald Trump.
You want to test the hypothesis that the population proportion
of people who will vote...

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