If the population proportion is 0.7. A researcher wants the margin of error to be 0.20 and the level of confidence is 90%.what is the required sample size?

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

A: (a) The proportions are 22.2% for males and 18.7% for females, The margin of error is 3%, and…

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

A: Given :  E = 3% = 0.03 p1 = 0.214 p2 = 0.187 Z = 2.576 at 99% confidence

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

A: a) Given, Margin error (E) = 0.03 Sample proportion = 0.34   The objective is to find the sample.…

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: If we want to be within 0.02 of the true proportion of homes that have a direct television receiver…

A: The population proportion is 82%, the confidence level is 98% and estimate is within 0.02.…

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

A: B) It is given that margin of error (E) is 0.04 and the confidence level is 0.95.

Q: b)  If the sample size was increased to 10,000 American movie-goers, what effect would this have on…

A:

Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A: Given information Error = 2% = 0.02 Confidence level = 0.95

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 we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A:

Q: f a research study reports a very borderline significance level, just a very small amount outside of…

A:

Q: 9. If the population proportion is 0.6. A researcher wants the margin of error to be 0.20. and level…

A:

Q: A polling agency wants to determine the percentage of voters in favor of extending tax cuts. They…

A:

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

A:

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Solution: a. From the given information, confidence level is 0.96, p=0.48 and E=0.03.

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

A: Given Margin of error=0.04 (a) she uses the estimates of 21.8​% male and 18.1​% female from a…

Q: In order to estimate the population proportion with a high school education,  you need a minimum…

A:

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

A:

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 calculates a 90% confidence interval of (0.24,0.4) for a proportion. What was the…

A: Given :confidence level = 90% confidence interval = (0.24,0.4) p is unknown, so p=0.5 We want to…

Q: Suppose we want to estimate the proportion of teenagers (aged 13-18) who are lactose intolerant. If…

A: According to the provided information, The z score at 95% confidence interval from the standard…

Q: If the population proportion is 0.7. A researcher wants the margin of error to be 0.20 and the level…

A:

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

A: A) Sample size obtained when he uses a previous estimate of 32%. As given he wishes the estimate to…

Q: Given that P = 54%, Confidence level is at 99%, acceptable error is 3%, please calculate the sample…

A: Answer is  1838

Q: 4. The Department of the Treasury is interested in finding out what proportion of people support…

A: Given that  Population proportion p=15%=0.15 Margin of error =E =2%=0.02 95% confidence.  NOTE:-…

Q: For a population data set, ở a. What should the sample size be for a 97 % confidence interval for u…

A:

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: intended population

A: A population is the entire group that you want to draw conclusions about   Intended population:…

Q: As a manufacturer of golf equipment, the Spalding Corporation wants to estimate the proportion of…

A: From the provided information, Margin of error (E) = 0.025 Confidence level = 99% Assuming the…

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: Given Information: Confidence level = 90% = 0.90 Margin of Error E=5%=0.05 Sample proportion of…

Q: As the newly hired manager of a company that provides cell phone service, you want to determine the…

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:

Q: Given the information: the sampled population is normally distributed, X– = 36.5, σ = 3, and n = 20.…

A: Given that

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

A: It is given that there is 95% confidence.

Q: Assume that a sample is being used to estimate a population mean μμ. If n = 19, x¯ = 43, and s = 3,…

A:

Q: If n=16, ¯xx¯(x-bar)=30, and s=10, find the margin of error at a 90% confidence level Give your…

A: Since population standard deviation is unknown, Use t-distribution to find t-critical value. Find…

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: Suppose we want to determine the proportion p of all Canadians who agree with the statement: “Prime…

A:

Q: If the population proportion is 0.7 . A researcher wants the margin of error to be 0.20 and the…

A: Given  pcap=0.7, Zcritical=1.96 at alpha=0.05 MOE=0.20

Q: 12) Find the sample size need to find the Population Proportion if the margin of error is 5%, the…

A:

Q: By how many times does the sample size have to be increased to decrease the margin of error by a…

A: Formula for margin of error is ME = Zα/2 * σ / √n where Zα/2 = critical value

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

A:

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

A: From the provided information, Confidence level = 99% Margin of error (E) = ±0.05 Proportion (p) =…

Q: If your target population is 123, how many samples do you need for a sampling error of .05 and a…

A:

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

A:

Q: You have been asked to estimate the proportion of households in Chicago that have two or more…

A: (a) Here, there is no information about the population parameter. Hence, use the conservative…

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

A: Given Error, E=±0.05CL=0.99

2-Proportion Test

In a 2-proportion test, two separate proportions are measured at the same time, and their similarity is evaluated. It is also known as a 2-proportion z-test, and a comparison of two different proportions is done in this method.