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 she wishes the estimate to be within four percentage points with 90​% ​confidence, assuming that (a) she uses the estimates of 21.8​% male and 18.1​% female from a previous​ year? (b) she does not use any prior​ estimates?

Q: 2) Assume the p=.03 (3%). How large a sample is needed to estimate the proportion of breast cancer…

A:

Q: What sample size is needed if a researcher needed to calculate the true proportion of individuals…

A: HERE , MOE  = 0.01 confidence level = 95% here z-critical for 95% confidence level = 1.96 here use…

Q: What sample size should be obtained if he wants to be within 4 percentage points with 95​%…

A: Given that the margin of error is 4 percentage points. That is, ME=4%=0.04 Confidence level =95% The…

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: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Given data, P1 = 21.9% = 0.219 P2 = 14.4% = 0.144 E = 2% = 0.02 Z= value at 95% confidence is Zc =…

Q: You work for NASA and are interested in determining the population proportion, with 99% confidence,…

A:

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A:

Q: According to the American Cancer Society, in 2016 10.7% of the U.S. working population commute to…

A: From the provided information, In 2016, 10.7% of the U.S. working population commute to work by…

Q: A doctor wants to estimate the mean HDL cholesterol of all​ 20- to​ 29-year-old females. How many…

A: The formula for the sample size is as follows:

Q: A nutritionist wants to estimate the difference between the percentage of men and women who have…

A: a. Computing the sample size: The confidence level is 90%. Therefore, α = 0.1,α/2=0.05 and 1-( α/2)…

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: Suppose the manager of a shoe store wants to determine the current percentage of customers who are…

A: Given: Confidence level=80% Margin of error, E=6%=0.06

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: c = 95% E = 2% = 0.02 p^1=0.215p^2=0.195

Q: Suppose the manager of a shoe store wants to determine the current percentage of customers who are…

A: Given that Confidence level=95% and Margin of error=6%

Q: You wish to determine what percentage of pre-kindergarten children ages 3 to 5 whose mother had a…

A: It is given that margin of error (E) is 0.05 and the confidence level is 0.90.

Q: Suppose that we wanted to estimate the true average number of eggs a queen bee lays with 99%…

A:

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: From the provided information, Confidence level = 90% Margin of error (E) = 0.03

Q: Which critical value would you use to estimate a population mean from a sample of size 15 with 99%…

A: Solution-: Given: n=15, c=0.99 We want to find the critical value to use to estimate a population…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Given data: Confidence level = 90% To find: Required sample size

Q: What should your sample size be if you want a confidence level of 90 percent and a margin of error…

A: We want to find the sample size (n)

Q: What happens to the sample size when you don’t know a prior sample proportion?

A: To calculate the sample size when we do not know prior sample proportion.

Q: In 2010, the proportion of Texans without health insurance was 0.11. To update this information a…

A:

Q: Example 11.A company engaged in selling ballpoint pens wishes to estimate the proportion of people…

A:

Q: Estimate 95% confidence interval for the proportion of household experiencing burglary in 2010."

A: 25.8 households per 1,000 were the victims of home burglary. These data are obtained from a survey…

Q: Suppose the manager of a shoe store wants to determine the current percentage of customers who are…

A: margin of error = 0.1 sample proportion = 0.05 z-critical value = 2.326

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: The formula for margin of error is given as follows: E=zα/2p11-p1n+p21-p2n

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: a) Compute the required sample size using the formula: E=zα2 p⏞11-p⏞1n+p⏞21-p⏞2n   Where 'E' is the…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A:

Q: Assume the managers have requested estimates of the mean attitudes towards each mall with a margin…

A: M.E= 0.05 Springdale Mean -3.81 Springdale STDEV - 1.06 West Mall Mean - 3.41 West Mall STDEV - 1.18…

Q: If you knew that I study reported that 67% of pre-kindergarten children ages 3 to 5 whose mother had…

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: Suppose a certain Statistics instructor wants to estimate the proportion of students who enjoy…

A: since estimate for proportion is not known therefor we take p⏞=0.5 margin of error=E= 0.03 level of…

Q: estimate the proportion of residents of a certain city and its suburbs who favor the construction of…

A: When we don't have any prior information about the population proportion, we generally take it as…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: To estimate the male proportion P1 = 0.223 and female proportion P2 = 0.198 Margin of Error E = 0.02…

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Percentage of level of confidence is 95%. Here, margin of error is, E=0.03.

Q: A physical therapist wants to determine the difference in the proportion of men and women who…

A: Given data: Confidence level = 99% Margin of error = 0.02

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

A:

Q: A study is to be made to estimate the proportion of residents of a certain city and its suburbs who…

A: Given: Margin of Error ME= 0.06 Confidence level c= 0.90

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

A:

Q: Your state is considering raising the legal age for consumption of alcohol beverages. How large a…

A: From the provided information, Margin of error (E) = 0.01 Confidence level = 99%

Q: A study is to be made to estimate the proportion of residents of a certain city and its suburbs who…

A: Given: Confidence level = 0.95, margin of error = E = 0.08.

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.