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 three percentage points with 95% confidence, assuming that (a) she uses the estimates of 22.2% male and 19.7% female from a previous year? (b) she does not use any prior estimates? (a) n= (Round up to the nearest whole number) ETER

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A: Given that  Margin of error =E =0.10 90% confidence.

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A: Introduction: The confidence interval for the unknown population proportion, p at the 100 (1 – α) %…

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

A: From the provided information, Margin of error (E) = 3% that is 0.03 Confidence level = 95% And

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

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

A: Margin of Error(E)=0.05For 99% confidence level Zα2=2.576 Formula; E=Zα2×(p×(1-p)n)

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 =…

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

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

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 that your sample size was 37, what is P(t<-1.74) (Negative 1.74)?

A: Given information- Sample size, n = 37 t-score = -1.74 We have to find the p (t&lt;-1.74). Degree of…

Q: Based on historical data at Oxnard College, we believe that 30% of freshman do not visit their…

A: Given Margin of error=E=0.05

Q: How large must the sample size be in order to to estimate a true proportion to within one percentage…

A: Given that, Critical value: Using the z-table, the critical value at 90% confidence level…

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: What is the margin of error for a 99% CI for a mean, when the sample size is 12, the sample average…

A: Given: Sample size, n = 12 Sample mean, x = 52 Sample standard deviation, s = 13 It follows a…

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.

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A: Given that the confidence level is 98% Therefore, the significance level is 1-confidence…

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A: The provided information are: Confidence level = 95% = 0.95 So, significance level (alpha) = 1-0.95…

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

A: a) Given,   Margin error = 0.02 Population proportion = 0.36   The objective is to find the sample…

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A:

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

A: GivenMargin of error(E)=0.03confidence level(c)=99%α=1-0.99=0.01α2=0.05zα2=z0.05=1.6449   (from…

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

A: The random variable is adults who have​ high-speed Internet access. It follows standard normal…

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

A: The question is about sample size estimation Given : Estimate is within  0.02 That means, Margin of…

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

A:

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

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

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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: đón't change their passwords very often. Because this estimate may be outdated, suppose that you…

A: p⏞=estimated proportion=0.64E=margin of error=0.05α=significance level=0.05 We want to determine…

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:

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Q: ‘In 1996, 31% of students reported that their mothers had graduated college. In 2000, the percentage…

A: The formula to calculate z-test statistic for proportion is given by,  ztest = (p̂ – p)/√[p(1–p)/n]…

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

A: (a) At a 95% confidence level, the z value is 1.96 which can be obtained by using the standard…