A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained physical activity. What sample size should be obtained if he wishes the estimate to be within four percentage points with 95​% ​confidence, assuming that ​(a) he uses the estimates of 21.1​% male and 19.6​% female from a previous​ year? ​(b) he does not use any prior​ estimates? ​(a) n=   ​(Round up to the nearest whole​ number.) ​(b) n=   ​(Round up to the nearest whole​ number.)

Q: For each of the following settings in Exercises 2.1.1-2.1.4, (i) identify the variable(s) in the…

A: Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: A researcher wishes to estimate the proportion of adults who have high - speed Internet access .…

A:

Q: A reporter wants to estimate the proportion, p, of local residents who are in favor of curbside…

A: 95% confidence interval for PMargin of error : E = 0.04No prior estimate for p ; use Required sample…

Q: Suppose you wish to determine the proportion of college students in NC who receive some form of…

A: Givenconfidence level=95%Margin of error(E)=0.04sample proportion(p^)=0.78

Q: Data from a representative sample were used to estimate that 31% of all computer users in a recent…

A: The preliminary estimate is, p=31%=0.31The defined margin of error is, E=0.05Since the level of…

Q: A Seattle consumer agency believes that plumbers’ rates are too high and wants to estimate the mean…

A: GivenConfidence Interval(c)=95%Margin of Error(E)=3%=0.03Let…

Q: A telephone company wishes to determine the percentage of homes with telephone answering ma What…

A:

Q: 1) Assume the p=.03 (3%). How large a sample is needed to estimate the proportion of breast cancer…

A:

Q: survey is planned to determine what proportion of high-school students in a metropolitan school…

A: * SOLUTION :-  From the given information the calculations are shown below

Q: If you wish to estimate a population mean with a sampling distribution error SE= 0.31 using a 95%…

A: The sample size needed is obtained below as follows : Obtain the area of probability in the right…

Q: A researcher wishes to estimate the proportion of adults who have​ high-speed Internet access. What…

A: Margin of Error = E = 0.04 Confidence Level = 99 Significance Level = α = (100-99)% = 0.01 α/2…

Q: A researcher wishes to estimate the proportion of adults who have​ high-speed Internet access. What…

A:

Q: Suppose a certain Statistics instructor wants to estimate the proportion of students that cheat on…

A: From the provided information,Confidence level = 95%Margin of error (E) = 0.02When no prior estimate…

Q: The University of Sydney conducted a survey to find out the average number of hours an academic…

A:

Q: The sample size required is (Round up to the nearest integer.)

A: Here use formula of margin of error

Q: A researcher wishes to estimate the proportion of adults who have​ high-speed Internet access. What…

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Q: Cora wants to determine a 80 percent confidence interval for the true proportion of high school…

A: GivenMargin of error(E)=0.04cofidence level(c)=80%assume population proportion (p)…

Q: f you wish to estimate a population mean with a sampling distribution error SE= 0.28 using a 95%…

A:

Q: If you want to be 95% confident of estimating the population proportion to within sampling error of…

A:

Q: If you want to be 95​% confident of estimating the population proportion to within a sampling error…

A:

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A: Given data How hard is it to reach a business person by phone? and given  let p be the proportion of…

Q: (b) Suppose the researcher wants to estimate the mean with a margin of error of no more than $20…

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Q: If you want to be 99% sure confident of estimating the population mean to within a sampling error of…

A: The critical value from the standard normal table at 99% confidence level is,

Q: If you wish to estimate a population mean with a sampling distribution error SE= 0.34 using a 95%…

A: From the provided information, Sampling error (SE) = 0.34 Confidence level = 95% Population variance…

Q: A researcher wishes to estimate the proportion of adults who have high-speed internet access. What…

A:

Q: A researcher wishes to estimate the proportion of adults who have​ high-speed Internet access. What…

A: Given,margin of error(E)=0.04α=1-0.95=0.05α2=0.025Z0.025=1.96    (from Z-table)

Q: In a study of government financial aid for college students, it becomes necessary to estimate the…

A: From the provided information, Margin of error (E) = 0.03 Confidence level = 99%

Q: L USE SALT (a) Use the given preliminary estimate to determine the sample size required to estimate…

A:

Q: Your state is considering raising the legal age for consumption of alcoholic beverages to 21 years…

A: p = 0.5 Margin of error = 0.01

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

A: Given that, Margin of error E=0.03 Confidence level is 90% Critical value: The two tailed z critical…

Q: 4. How large a sample must be taken to estimate the proportion of households in which a cell phone…

A: In probability theory, a normal distribution is a type of continuous probability distribution for a…

Q: A researcher wishes to estimate the percentage of adults who support abolishing the penny. What size…

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Q: A researcher wishes to estimate the proportion of adults who have​ high-speed Internet access. What…

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Q: Calculate the sample size needed in order to estimate the true proportion of defective in a large…

A:

Q: For this problem, carry at least four digits after the decimal in your calculations. Answers may…

A:

Q: A researcher wishes to estimate the proportion of adults who have​ high-speed Internet access. What…

A: Given,Margin of error, E = 0.04Confidence level, C = 99% = 0.99

Q: The Student Health Center at NCSU would like to conduct a survey to estimate the proportion of NCSU…

A: The question is about sample size estimation.Given :Margin of error ( E ) = 0.04Confidence level ( C…

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.