Question
In: Statistics and Probability
A researcher wishes to estimate, with 90% confidence, the population proportion of adults who think Congress...
A researcher wishes to estimate, with 90% confidence, the population proportion of adults who think Congress is doing a good or excellent job. Her estimate must be accurate within
22% of the true proportion.
(a) No preliminary estimate is available. Find the minimum sample size needed.
(b) Find the minimum sample size needed, using a prior study that found that 20%
of the respondents said they think Congress is doing a good or excellent job.
(c) Compare the results from parts (a) and (b).
Solutions
Expert Solution
A researcher wishes to estimate with 90% confidence, the population proportion of adults who think Congress is doing good or excellent job. Her estimate must be accurate within 22% of the true proportion.
That is margin of error of me=0.22
The minimum sample size needed:
orchestra answered 1 year agoRelated Solutions
A researcher wishes to estimate, with 90% confidence, the population proportion of adults who think the...
A researcher wishes to estimate, with 90% confidence, the
population proportion of adults who think the president of their
country can control the price of gasoline. Her estimate must be
accurate within 4% of the true proportion. a) No preliminary
estimate is available. Find the minimum sample size needed. b)
Find the minimum sample size needed, using a prior study that
found that 32% of the respondents said they think their president
can control the price of gasoline. c) Compare...
A researcher wishes to estimate, with 99% confidence, the population proportion of adults who think Congress...
A researcher wishes to estimate, with 99% confidence, the
population proportion of adults who think Congress is doing a good
or excellent job. Her estimate must be accurate within 2% of the
true proportion. (a) No preliminary estimate is available. Find
the minimum sample size needed. (b) Find the minimum sample size
needed, using a prior study that found that 34% of the respondents
said they think Congress is doing a good or excellent job. (c)
Compare the results from...
7)A researcher wishes to estimate, with 99% confidence, the population proportion of adults who think Congress...
7)A researcher wishes to estimate, with 99% confidence, the
population proportion of adults who think Congress is doing a good
or excellent job. Her estimate must be accurate within
33% of the true proportion.
(a) No preliminary estimate is available. Find the minimum
sample size needed.
(b) Find the minimum sample size needed, using a prior study
that found that
32% of the respondents said they think Congress is doing a good
or excellent job.
(c) Compare the results from...
A researcher wishes to estimate, with 90% confidence, the population proportion of adults who are confident...
A researcher wishes to estimate, with 90% confidence, the
population proportion of adults who are confident with their
country's banking system. His estimate must be accurate within 4%
of the population proportion. (a) No preliminary estimate is
available. Find the minimum sample size needed. (b) Find the
minimum sample size needed, using a prior study that found that
32% of the respondents said they are confident with their
country's banking system. (c) Compare the results from parts (a)
and (b).
A researcher wishes to estimate, with 90% confidence, the population proportion of adults who are confident...
A researcher wishes to estimate, with 90% confidence, the
population proportion of adults who are confident with their
country's banking system. His estimate must be accurate within 5%
of the population proportion. (a) No preliminary estimate is
available. Find the minimum sample size needed. (b) Find the
minimum sample size needed, using a prior study that found that
25% of the respondents said they are confident with their
country's banking system. (c) Compare the results from parts (a)
and (b)....
A researcher wishes to estimate, with 95% confidence, the population proportion of adults who think the...
A researcher wishes to estimate, with
95%
confidence, the population proportion of adults who think the
president of their country can control the price of gasoline. Her
estimate must be accurate within
33%
of the true proportion.
a) No preliminary estimate is available. Find the minimum
sample size needed.
b) Find the minimum sample size needed, using a prior study
that found that
3838%
of the respondents said they think their president can control
the price of gasoline.
c) Compare...
A researcher wishes to estimate, with 95% confidence, the population proportion of adults who think the...
A researcher wishes to estimate, with 95% confidence, the
population proportion of adults who think the president of their
country can control the price of gasoline. Her estimate must be
accurate within 44% of the true proportion.
a) No preliminary estimate is available. Find the minimum
sample size needed.
b) Find the minimum sample size needed, using a prior study
that found that
46% of the respondents said they think their president can
control the price of gasoline.
c) Compare...
A researcher wishes to estimate, with 99 % confidence, the population proportion of adults who think...
A researcher wishes to estimate, with 99 % confidence, the
population proportion of adults who think Congress is doing a good
or excellent job. Her estimate must be accurate within 2 % of the
true proportion. (a) No preliminary estimate is available. Find
the minimum sample size needed. (b) Find the minimum sample size
needed, using a prior study that found that 28 % of the
respondents said they think Congress is doing a good or excellent
job. (c) Compare...
A researcher wishes to estimate, with 90% confidence, the population proportion of adults who eat fast...
A researcher wishes to estimate, with 90% confidence, the
population proportion of adults who eat fast food four to six times
per week. Her estimate must be accurate within 5% of the
population proportion.
(a) No preliminary estimate is available. Find the minimum
sample size needed.
(b) Find the minimum sample size needed, using a prior study
that found that 40% of the respondents said they eat fast food
four to six times per week.
(c) Compare...
A researcher wishes to? estimate, with 99 ?% ?confidence, the population proportion of adults who are...
A researcher wishes to? estimate, with 99 ?% ?confidence, the
population proportion of adults who are confident with their?
country's banking system. His estimate must be accurate within 2 ?%
of the population proportion. ?(a) No preliminary estimate is
available. Find the minimum sample size needed. ?(b) Find the
minimum sample size? needed, using a prior study that found that 36
?% of the respondents said they are confident with their? country's
banking system. ?(c) Compare the results from parts...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- An asset is purchased on January 1 for $48,700. It is expected to have a useful...
- Do we have any online or offline tool to convert c and cpp programs into MIPS...
- -what is the pH of HCl 0,1M and NaCl 0,1M mixed together solution? -What is the...
- function X=extractDWT(x_train,startS,endS,wStep,wRange) % x_train = input signal % startS = from second % endS = end...
- Do you agree that Social Loafing is similar to Theory X. Give an example to support...
- Computing Cost of Goods Sold and Ending Inventory. Bartov Corporation reports the following beginning inventory and...
- SQL FORMAT (11-13 are completed and correct) -- 11. what are the names of all students...
ADVERTISEMENT