Question

a researcher wishes to estimate the percentage of adults who support abolishing the penny. What size sample should be obtained if he wishes the estimate to be within 2 percentage points with 90% confidence if

(a) he uses a previous estimate of 25 %?

(b) he does not use any prior estimates?

Answer #1

A researcher wishes to estimate the percentage of adults who
support abolishing the penny. What size sample should be obtained
if he wishes the estimate to be within 5 percentage points with 90
% confidence if
(a) he uses a previous estimate of 25 %?
(b) he does not use any prior estimates?

A researcher wishes to estimate the percentage of adults who
support abolishing the penny. What size sample should be obtained
if he wishes the estimate to be within 33 percentage points with
90% confidence if
(a) he uses a previous estimate of 26%?
(b) he does not use any prior estimates?
a) n= ______ (Round up to the nearest integer.)

A researcher wishes to estimate the percentage of adults who
support abolishing the penny. What size sample should be obtained
if he wishes the estimate to be within 4 percentage points with
99% confidence if
(a) he uses a previous estimate of 22%?
(b) he does not use any prior estimates?

A researcher wishes to estimate the percentage of adults who
support abolishing the penny. What size sample should be obtained
if he wishes the estimate to be within 5 percentage points with
99% confidence if
(a) he uses a previous estimate of 28%?
(b) he does not use any prior estimates?

A researcher wishes to estimate the percentage of adults who
support abolishing the penny. What size sample should be obtained
if he wishes the estimate to be within
55
percentage points with
9595%
confidence if
(a) he uses a previous estimate of
2424%?
(b) he does not use any prior estimates?

A researcher wishes to estimate the percentage of adults who
support abolishing the penny. What size sample should be obtained
if he wishes the estimate to be within 2 percentage points with
95% confidence if
(a) he uses a previous estimate of 34%?
(b) he does not use any prior estimates?

A researcher wishes to estimate the percentage of adults who
support abolishing the penny. What size sample should be obtained
if he wishes the estimate to be within 5 percentage points with
99% confidence if
(a) he uses a previous estimate of 25%?
(b) he does not use any prior estimates?
(a)n=
(Round up to the nearest integer.)

9.1.9) A researcher wishes to estimate the percentage
of adults who support abolishing the penny. What size sample should
be obtained if he wishes to estimate to be within 3 percentage
points with 9% confidence if
a.) he this is a previous estimate of 38%?
b.) he does not use any prior estimates?

A researcher wishes to estimate the percentage of adults who
support abolishing the penny. What size sample should be obtained
if he wishes the estimate to be within 2 percentage points with
99% confidence if (a) he uses a previous estimate of 34%? (b)
he does not use any prior estimates? (a) n equals nothing (Round
up to the nearest integer.) (b) n equals nothing (Round up to
the nearest integer.)

2. A researcher wishes to estimate the percentage of adults who
support abolishing the penny. What size sample should be obtained
if he wishes the estimate to be within
2 percentage points with 90% confidence if
(a) he uses a previous estimate of 22%?
(b) he does not use any prior estimates?
3. In a poll, 37% of the people polled answered yes to the
question "Are you in favor of the death penalty for a person
convicted of...

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