Question

A poll taken this year asked 1006 adults whether they were fans of a particular sport and 39 % said they were. Last year, 44 % of a similar-size sample had reported being fans of the sport. Complete parts a through e below

a) Find the margin of error for the poll taken this year if one wants 95% confidence in the estimate of the percentage of adults who are fans of the sport.

b) Explain what that margin of error means.

c) If one wanted to be 99%confident instead of 95% confident, would the margin of error be larger or smaller?

d) Find the margin of error for the poll taken this year if one wants 99% confidence in the estimate of the percent of adults who are fans of the sport.

e) In general, if all other aspects of the situation remain the same, will smaller margins of error produce greater or less confidence in the interval?

Answer #1

A poll taken this year asked 1015 adults whether they were fans
of a particular sport and 40% said they were. Last year, 39% of
a similar-size sample had reported being fans of the sport.
Complete parts a through e below.
a.) Find the margin of error for the poll taken this year if one
wants 90% confidence in the estimate of the percentage of adults
who are fans of the sport.
b.) Explain what margin of error means
c.)...

A poll taken this year asked 1010 adults whether they were fans
of a particular sport and 47% said they were. Last year, 46% of
a similar-size sample had reported being fans of the sport.
Complete parts a through e below.
a) Find the margin of error for the poll taken this year if one
wants 95% confidence in the estimate of the percentage of adults
who are fans of the sport. MEequals nothing (Round to three
decimal places as...

A poll taken this year asked 1034 adults whether they were fans
of a particular sport and 42% said they were. Last year, 41%
of a similar-size sample had reported being fans of the sport.
Complete parts a through e below.
a) Find the margin of error for the poll taken this year if one
wants 90% confidence in the estimate of the percentage of adults
who are fans of the sport.
d) Find the margin of error for the...

in a random poll taken in 2008, Gallup asked 1006 national
adults whether they were baseball fans. 433 of the sample said they
were. Construct a 95% confidence interval to estimate the
proportion of national adults who are baseball fans. Use 4
non-zero decimal places on calculations.
a) Find the Zα/2
b) Find σpˆ
c) Find the margin of error (MoE) and construct the confidence
interval

A Gallup poll asked 175 American adults whether they were
baseball fans and 65% said they were. Find the margin of error if
we want to create a 90% confidence interval for the true proportion
of American adults who are baseball fans. Write your answer in
decimal format to 3 decimal places. For example, 0.123 would be the
correct format.

A biotechnology firm is planning its investment strategy for
future products and research labs. A poll found that 99% of a
random sample of 1022 adults approved of attempts to clone a human.
Use this information to complete parts a through e.
a) Find the margin of error for this poll if we want
95% confidence in our estimate of the percent of adults who
approve of cloning humans.
ME = ________________(round to three decimal places)
b) Explain what...

A small company involved in e-commerce is interested in
statistics concerning the use of e-mail. A poll found that 36% of
a random sample of 1084 adults, who use a computer at their home,
work, or school, said they do not send or receive e-mail.
Complete parts a through e. a) Find the margin of error for this
poll if we want 99% confidence in our estimate of the percent of
American adults who do not use e-mail. MEequals 34...

Gallup poll consisted of 1012 randomly selected adults who were
asked whether or not cloning of humans should be allowed. 901 of
the adults surveyed said that cloning should not be allowed.
Construct a 98% confidence interval to estimate the true percentage
of all adults who hold this belief. 1. State the Parameter 2. Find
the point estimate 3. Check assumptions 4.Find the critical value
5. Find the margin of error 6. Find the confidence interval
limits

A poll wants to construct a 95% confidence interval for the
proportion of adults who believe that economic conditions are
getting better. A poll taken in July estimates this proportion to
be 0.33 using this estimate what sample sizes needed so that the
confidence interval will have a margin of error of .081

A biotechnology firm is planning its investment strategy for
future products and research labs. A poll found that
5
%
of a random sample of
1047
adults approved of attempts to clone a human. Use this
information to complete parts a through e.
a) Find the margin of error for this poll if we want
99
%
confidence in our estimate of the percent of adults who approve
of cloning humans.
MEequals
0.017
(Round to three decimal places as needed.)...

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