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Find an estimate of the sample size needed to obtain the specified margin of error for the 95% confidence interval. A researcher wishes to estimate the mean amount of money spent per month on food by households in a certain
asked by jim on April 26, 2015 
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A researcher at a major hospital wishes to estimate the proportion of the adult population of the U.S. that has high blood pressure. How large a sample is needed in order to be 99% confident that the sample proportion will not
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A researcher at a major clinic wishes to estimate the proportion of the adult population of the US that has sleep deprivation. How large a sample is needed in order to be a 95% confident that the sample proportion will not differ
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A reasearcher wishes to be 95% confident that her estimate of the proportion of two individuals who travel over sea is within 4% of the true proportion. Find the sample necessary if in a prior study a sample of 200 people showed
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Math HELP!!!!!
A researcher wishes to estimate the mean amount of money spent per month on food by households in a certain neighborhood. She desires a margin of error of $30. Past studies suggest that a population standard deviation of $248 is
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A researcher wishes to estimate the mean height of women aged between 60 and 65 in the US. She desires a margin of error of 0.2 inches. Past studies suggest that a population standard deviation deviation of 3.2 inches is
asked by dan on January 23, 2012 
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A researcher wishes to estimate the mean amount of money spent per month on food by households in a certain neighborhood. She desires a margin of error of $30. Past studies suggest that a population standard deviation of $248 is
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1) Construct a confidence interval of the population proportion at the given level of confidence. x=60,n=300, 99% confidence. The 99% confidence interval is (_,_) 2) A researcher wishes to estimate the proportion of adults who
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Statistics
A researcher wishes to estimate the proportion of adults who have highspped internet access. What size sample should be obtained if she wishes the estimate to be within .02 with 90% if A) She uses a previous estimate of 0.48? B)
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Choose the correct response. Why is sampling without replacement acceptable with a large population? a. When a small sample is taken from a large population, the samples maintain their independence. b. When a large sample is taken
asked by maczindahouse on February 28, 2019