Question
In: Math
1. a. A researcher wishes to estimate the proportion of adults who have high-speed Internet access....
1.
a. 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 0.3 with 99% confidence?
b.
it is believed that people prefer rubies over other gems. In a recent simple random survey of 150 people, 63 said they would prefer a ruby over other gems. Use this sample data to complete a hypothesis test to determine if a majority of people would prefer a ruby. over other gems at the 0.01 significance level.
Be sure to include all the steps for a complete hypothesis test - start and end in context, test conditions, show formulas and numbers used, clearly state REJECT or FAIL TO reject.
c.
If 12 jurors are randomly selected from a population that is 45% Hispanic, what is the probability that 2 or fewer jurors will be Hispanic?
Solutions
milcah answered 7 months agoRelated Solutions
A researcher wishes to estimate the proportion of adults who have high speed internet access. What...
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 .03 with 99%
confidence if a) she uses a previous estimate of .58? b) she 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?
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 0.04 with 99%
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 0.05 with 99%
confidence if
a) she uses a previous estimate of 0.54?
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 0.02 with 90%
confidence if a) she uses a previous estimate of 0.28? b) she
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 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 0.05 with 99%
confidence if
(a) she uses a previous estimate of 0.54?
(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 0.04 with 99%
confidence if
(a) she uses a previous estimate of 0.28?
(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 95% confidence if:
(a) she uses a previous estimate of .42?
(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 0.04 with 95 %
confidence:
a) assuming a previous study concluded that the proportion of
adults who have high-speed internet access was 0.48?
b) assuming the researcher has no previous results to
reference?
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