given data are:-
p = 0.55
margin of error (E) = 0.01
z critical value for 96% confidence level, both tailed test be:-
[ in any blank cell of excel type =NORMSINV(0.98)]
the needed sample size be:-
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Find the sample size needed to estimate the percentage of democrats among registered voters in Florida....
1. Find the sample size needed to estimate the proportion of houses that have security systems if the sample proportion h = 0.19, the margin of error is 0.02, and the confidence level is 90%. 2. Suppose that in a random sample of 50 adults, 41 were registered to vote. Construct a 95% confidence level interval for the population proportion of registered voters.
Suppose that in a random sample of 600 registered voters in one Florida county, 87.9% strongly agreed with the statement: "The State of Florida should have only one method of reading and counting ballots”. Based on this information, a statistician calculated, for the percentage of all registered voters with this view, a confidence interval extending from 85.8% to 90.0%. Find the confidence level associated with this i nterval.
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Find the sample size, n, needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.07 margin of error, use a confidence level of 90%, and use results from a prior poll suggesting that 17% of adults have consulted fortune tellers. n =
Find the sample size, n, needed to estimate the percentage of adults who have consulted fortune tellers. Use a 0.04 margin of error, use a confidence level of 98% and use results from a prior poll suggesting that 11% of adults have consulted fortune tellers. A student wants to estimate the mean score of all college students for a particular exam. First use the range rule of thumb to make a rough estimate of the standard deviation of those scores....
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Find the sample size, n, needed to estimate the percentage of adults who have consulted fortune tollers. Use a 0.02 margin of error, use a confidence level of 90%, and use results from a prior poll suggesting that 16% of adults have consulted fortune tellers. n= (Round up to the nearest integer.)
Use the given data to find the minimum sample size required to estimate a population proportion or percentage. Margin of error: 0.01; confidence level 90%; p and ĝ unknown n= (Round up to the nearest integer.)
Among registered voters in Michigan, the Democratic candidates range from narrowly ahead to essentially tied with President Trump in head to head election matchups: Sanders narrowly tops Trump 48 - 43 percent 845 self-identified registered voters in Michigan with a margin of error of +/- 3.4 percentage points a) Verify the margin of error by doing you own calculation. Include the calculation in your post. b) Report the confidence intervals for the top two candidates using the most common 95%...
The sample size needed to estimate the difference between two population proportions to within a margin of error m with a significance level of α can be found as follows. In the expression m=z∗p1(1−p1)n1+p2(1−p2)n2−−−−−−−−−−−−−−−−−−−−√ we replace both n1 and n2 by n (assuming that both samples have the same size) and replace each of p1, and p2, by 0.5 (because their values are not known). Then we solve for n, and get n=(z∗)22E2. Finally, increase the value of n to...