Solve for the sample size: Determine the sample size necessary to estimate the proportion of people shopping at a supermarket in the U.S. that identify as vegan with 95% confidence, and a margin of error of 5%. Some studies estimate that approximately 6% of the U.S. population identify as vegan.

Q: An online news source reports that the proportion of smart phone owners who use a certain operating…

A: Here we need to find the mean of the sampling distribution. Here it is given that the sample size is…

Q: It is known that 40% of all customers at a service station pay with a credit card. If a random…

A: Given  p=0.40, x=75, n=200

Q: What is the sampling error for an estimate of the population proportion, p = 0.36, if the true…

A: We have to find the sampling error for an estimate of the population proportion

Q: find the sample size needed to estimate the percentage of democrats who have tattoos. Use a 0.05…

A:

Q: You wish to estimate, with 90% confidence, the proportion of tablet owners who use their tablets…

A: Solution: 1. From the given information, confidence level is 0.90 and E=0.02. Since the proportion…

Q: Assume that a samlpe is used to estimate a population proportion p.  Find the margin of error E that…

A: Given that n=sample size=800p=probability of success=40%=0.40z= critical value for 98% confidence…

Q: The larger the sample size, the smaller the standard error. True or Fale?

A: Given that, The larger the sample size, the smaller the standard error.

Q: Why is a sample often a better way to obtain information about a population than a census? A. A…

A: Census:- In census,we collect our survey data from entire population.   Sample :- In sample ,we…

Q: Use the given information to find the minimum sample size required to estimate an unknown population…

A: A confidence interval and hypothesis testing are inference process which is used to draw conclusions…

Q: Determine the minimum sample size needed if we want to estimate the population percent of students…

A:

Q: Which statement is true? larger sample sizes produce greater sampling error larger sample sizes…

A: Option c) is correct. greater sampling error produces greater margin of error

Q: A rare birth defect occurs in approximately 0.5% of all cases in males. If we sample all the males…

A: Given information: The total number of males born in 2016 in a specific region is N = 200,000. It is…

Q: A researcher wishes to estimate, with 93% confidence, the percentage of people who own a home…

A:

Q: A research firm needs to estimate within 3% the proportion of junior executives leaving large…

A: From the given information , E = 3% = 0.03 = 0.41Confidence level , C = 0.95

Q: A researcher would like to determine the proportion of cities that has a semiautomated waste…

A: Obtain the sample size of a no preliminary estimate for p.   The formula of sample size is, Use…

Q: An insurance company wishes to keep the error rates in medical claims at or below 5%. If there is…

A: Given information: An insurance company wishes to keep the error rates in medical claims at or below…

Q: Suppose that you are attempting to estimate the weight of 600 parts. In order to use the infinite…

A:

Q: We are interested in conducting a study in order to determine what percentage of voters would vote…

A: Given that, If the prior information is unknown assume that the sample proportion  is 0.50 Critical…

Q: A pollster wishes to estimate, with 99% confidence, the proportion of people who believe that recent…

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

Q: Use the given data to find the minimum sample size required to estimate the population proportion.…

A: Ans - Given, Margin of error: E =  0.01;      confidence level: 95%; α = 1 - 0.95 = 0.05 Zα2  = 1.96…

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

A:

Q: Determine whether the following sampling is dependent or independent. Indicate whether the response…

A: Determine whether the following sampling is dependent or independent. Indicate whether the response…

Q: A sample of size 50 was drawn from a population that is not necessarily normally distributed. The…

A:

Q: Giraffes have excellent vision. Refér to (Oct. 2013) study of a giraffe's eyesight, Exercise 7.38…

A:

Q: Define the standard error for the sampling distribution of proportions.

A: Introduction: The standard deviation of the distribution of sample proportion is called the standard…

Q: Suppose you would like to estimate, with 97% confidence, the proportion of computers that need…

A: It is given that the level of confidence is 97% and desired margin of error E is 0.035.The formula…

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

A: Given Data: Margin of Error=0.22 p=0.54   z-value=1.96

Q: assume that a sample is used to estimate a population proportion p. find the margin of error E that…

A: The confidence level is 0.02.

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

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: Find the estimated standard error for the sample mean for n = 8 and SS= 5042.

A: Given n=8, SS=5042

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

A:

Q: Use the given data to find the minimum sample size required to estimate the population proportion.…

A: From the given information,   Margin error = 0.07 Sample proportion = 0.22   The objective is to…

Q: Sample size. A pollster wishes to estimate,with 95% confidence, the proportion of people who believe…

A: It is given that margin of error (E) is 0.03 and the confidence level is 95%.

Q: About 79 % of college students support a "smoke free" campus initiative. What is the minimum…

A: The problem is asking for the minimum sample size required so that the sampling distribution of the…

Q: A researcher would like to estimate the proportion of home-based businesses owned by women. What is…

A: Confidence interval = 80 % Margin of error = 2.4% We have to find the sample size = ?

Q: Find the sample size, n, needed to estimate the percentage of adults who have consulted fortune…

A: Obtain the sample size of a preliminary estimate for p is 0.14.   The formula of sample size is,…

Q: A pollster wishes to estimate, with 95% confidence, the proportion of people who believe that recent…

A: a) Assume p-hat as 0.5, since no preliminary estimate is available.

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: Use the sample data and confidence level given below.   A research institute poll asked respondents…

A:

Q: Prof. Jacob wants to know, with 90% confidence, the proportion of students who like to eat in the…

A: Given, Confidence interval, α = 90 Sample proportion, p^ = 0.62 Margin of error, M.E = 0.025

Q: The Bureau of Labor Statistics reports that the official unemployment rate for Black people was…

A: Variables are of different types. The correct classification of variables and the identification of…

Q: A survey investigates whether the proportion of 8% for employees who commute by car to work is…

A: Type II error (β) is the probability of fail to reject the null hypothesis when alternative…