Question
In: Statistics and Probability
A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size...
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 36%?
(b) he does not use any prior estimates?
Solutions
orchestra answered 2 years agoRelated Solutions
A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size...
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 24%? (b)
he does not use any prior estimates? n=?
A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size...
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
95%
confidence if(a) he uses a previous estimate of
26%?
(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...
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 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...
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
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...
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 99% 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...
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...
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
he uses a previous estimate of 38%?
(b) He does not use any prior estimates?
A researcher wishes to estimate the percentage of Americans who support abolishing the penny. What size...
A researcher wishes to estimate the percentage of Americans who
support abolishing the penny. What size sample should be obtained
if he wishes to estimate to be within 4 percentage points with 98%
confidence if
a) he uses a 2006 estimate of 14% obtained from another
poll?
b) he does not use any prior estimate?
A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size...
A researcher wishes to estimate the proportion of adults who
have high-speed Internet access. What size sample should be
obtained if she wishes the estimate to be within 0.03 with 95 %
confidence if
(a) she uses a previous estimate of 0.34 ?
(b) she does not use any prior estimates?
A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size...
A researcher wishes to estimate the proportion of adults who
have high-speed Internet access. What size sample should be
obtained if she wishes the estimate to be within 0.01 with 90&
confidence if
(a) she uses a previous estimate of 0.42
(b) she does not use any prior estimates?
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