Question
In: Statistics and Probability
1) The Gallup Poll asked a random sample of 1785 adults whether they attended church or...
1) The Gallup Poll asked a random sample of 1785 adults whether they attended church or synagogue during the past week. Of the respondents, 44% said they did attend. Suppose that 40% of the adult population actually went to church or synagogue last week. Let p^ be the proportion of people in the sample who attended church or synagogue. Find the probability of obtaining a sample of 1785 adults in which 44% or more say they attended church or synagogue last week. Do you have any doubts about the result of this poll?
2) Suppose 47% of all adult women think they do not get enough time to themselves. An opinion poll interviews 1025 randomly selected women and records the sample proportion who feels they don’t get enough time for themselves. If this sample were repeated numerous times, in what range would the middle 95% of the sample results fall? What is the probability the poll gets a sample in which fewer than 45% say they do not get enough time for themselves?
Solutions
orchestra answered 1 year agoRelated Solutions
The Gallup Poll asked a probability sample of 2500 U.S. adults whether they used a credit...
The Gallup Poll asked a probability sample of 2500 U.S. adults
whether they used a credit card to pay for groceries that week.
Suppose that 25% of the adult population did. We would like to know
the probability that an SRS of size 2500 would come within plus or
minus 2 percentage points of this true value.
If p-hat is the proportion of the sample who did use a credit
card to pay for groceries, what is the mean of...
[20 pts] In a random poll taken in 2008, Gallup asked 1010 national adults whether they...
[20 pts] In a random poll taken in 2008, Gallup asked 1010
national adults whether they were baseball fans. 570 of the sample
said they were. Construct a 96% confidence interval to estimate the
proportion of national adults who are baseball fans. Use 4 non-zero
decimal places in your calculations.
a)Za/2
b)Find σp̂
c)Find the margin of error and construct the confidence
interval
The Gallup Poll once asked a random sample of 1600 adults “Do you happen to do...
The Gallup Poll once asked a random sample of 1600 adults “Do
you happen to do step aerobics?” Suppose that in fact 26% of all
Americans do step aerobics.
a) What is the mean of the sampling distribution of proportions
who do step aerobics?
b) What is the standard deviation the sampling distribution of
proportions who do step aerobics?
c) Justify the distribution: HINT: Check that np and n(1-p) are
greater than or equal to 10.
d) What is the...
A Gallup poll asked a random sample of 1000 adults nation-wide the following question:: "Are you...
A Gallup poll asked a random sample of 1000 adults nation-wide
the following question:: "Are you in favor of the death penalty for
a person convicted of murder?" 71% of the people in the sample
answered "Yes".
1. A 95% Confidence Interval for the percent of all adults
nation-wide in favor of the death penalty is (Hint: Fill in the
first blank with the sample % and the second with the margin of
error.)
（ ） % +/- （ ）%...
A Gallup Poll asked a sample of Canadian adults if they thought the law should allow...
A Gallup Poll asked a sample of Canadian adults if they thought
the law should allow doctors to end the life of a patient who is in
great pain and near death if the patient makes a request in
writing. The poll included 255 people in Quebec, 203 of whom agreed
that doctor-assisted suicide should be allowed.
(a) What is the margin of error for a 95% confidence interval
for the proportion of all Quebec adults who would allow
doctor-assisted...
A Gallup poll asked a sample of Canadian adults if they thought the law should allow...
A Gallup poll asked a sample of Canadian adults if they thought
the law should allow doctors to end the life of a patient who is in
great pain and near death if the patient makes a request in
writing. The poll included 295 people in Quebec, 230 of whom agreed
that doctor-assisted suicide should be allowed.
(a) What is the margin of error of the large-sample 99%
confidence interval for the proportion of all Quebec adults who
would allow...
In 2013, the Gallup Poll asked 1015 American adults whether they believed that people should pay...
In 2013, the Gallup Poll asked 1015 American adults whether they
believed that people should pay sales tax on items purchased over
the internet. Of these, 437 said they supported such a tax. Does
the survey provide enough evidence that less than 45% of American
adults favor an internet sales tax? Use α = 0.05
level of significance?
b) Step 2: Find the test statistic.
c) Step 3: P-value OR Critical value(s): Label answer as
“P-value” or “CV” and draw...
The Gallup survey company conducted a poll in May 2011. Researchers asked a random sample of...
The
Gallup survey company conducted a poll in May 2011. Researchers
asked a random sample of about 1000 U.S. adults the following
question: “From what you know or have read about raising the debt
ceiling, would you want your member of Congress to vote in favor
of, that is, for raising the debt ceiling, to vote against raising
the debt ceiling, or do you not know enough about this issue to
say?” Forty-eight percent of the adults who responded said...
The Gallup survey company conducted a poll in May 2011. Researchers asked a random sample of...
The Gallup survey company conducted a poll in May 2011.
Researchers asked a random sample of about 1000 U.S. adults the
following question: “From what you know or have read about raising
the debt ceiling, would you want your member of Congress to vote in
favor of, that is, for raising the debt ceiling, to vote against
raising the debt ceiling, or do you not know enough about this
issue to say?” Forty-eight percent of the adults who responded said...
Assume a 2015 Gallup Poll asked a national random sample of 515 adult women to state...
Assume a 2015 Gallup Poll asked a national random sample of 515
adult women to state their current weight. Assume the mean weight
in the sample was ?¯=155.
We will treat these data as an SRS from a normally distributed
population with standard deviation ?=33 pounds.
Give a 99% confidence interval for the mean weight of adult
women based on these data. Enter the upper and lower values of your
confidence interval into the spaces provided rounded to two decimal...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- Naive reasoning suggests that a string theory vacuum with cosmological constant Lambda1 is always unstable as...
- I. Design and code a class Rectangle that has the following properties: Two private members double...
- A bond has a $1,000 par value, 10 years to maturity, and an 8% annual coupon...
- The following are the monthly rates of return for Madison Cookies and for Sophie Electric during...
- 1.) Think back to August 6, 1945. The United States has just dropped an atomic weapon...
- Carry out the equipment and operating procedures between injection molding of thermoplastics and injection molding of...
- The cumulative timing approach was used to time a job and its elements. Use the following...
ADVERTISEMENT