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 26%?
(b) he does not use any prior estimates?
Solution:
Given that
Margin of error = E = 5% = 0.05
(a)
At 99% confidence interval the Z is
(b)
A researcher wishes to estimate the percentage of adults who support abolishing the penny.
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 99% confidence if (a) he uses 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 4 percentage points with 90%
confidence if:
a.) he uses previous estimate of 28%
b.) he does not use any prior estimates?
c a Arenewcher wishes to estimate the percentage of adults who support abolishing the penny Whatsze sample should be obtained if he wishes the estimate to be within 4 percentage...
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 3 percentage points with 95% confidence if (a) he uses a previous estimate of 26%? (b) he does not use any prior estimates? (a) na (Round up to the nearest integer.) (b)(Round up to the nearest integer.)
this region 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 5. he uses a previous estimate of 38% b. he does not use any prior estimates? Page 4 of 4
A researcher wishes to estimate the percentage of adults who support abolishing the penny What stresample should be obtained if he wishes the estimate to be within 4 percentage points wm 99% confidence (a) he uses a previous estimate of 2012 b) he does not use any prior estimates? (a) 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 3 percentage points with 90% confidence if (a) he uses a previous estimate of 36%? (b) he does not use any prior estimates? (a) nRound up to the nearest integer) (b)n(Round up to the nearest integer)
Q4.
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 90% confidence if (a) he uses a previous estimate of 32%? (b) he does not use any prior estimates? (a)n(Round up to the nearest integer.) (b)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 2 percentage points with 95% confidence if (a) he uses a previous estimate of 36%? (b) he does not use any prior estimates? (a) n= (Round up to the nearest integer.) (b) 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 5 percentage points with 95% confidence if(a) he uses a previous estimate of 32%? (b) he does not use any prior estimates? (a) nequals=nothing (Round up to the nearest integer.)(b) nequals=nothing (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 2 percentage points with 90% confidence if (a) he uses a previous estimate of 36%? (b) he does not use any prior estimates? (a) n(Round up to the nearest integer) (b) n (Round up to the nearest integer ) Enter your answer in each of the answer boxes Save for Later Chapter...