A research group wants to estimate the proportion of consumers who plan to buy a scanner for their PC during the next 3 months.a. How many people should be sampled so that the sampling error is at most 0.04 with a 90% confidence interval?b. What is the sample size required if the confidence is increased to 95%, keeping the sampling error the same?c. What is the required sample size if the research group extends the sampling error to 0.05 and wants a 98% confidence level?

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

A:

Q: USA Today reported that about 47% of the general consumer population in the United States is loyal…

A: The hypotheses are given below: Null hypothesis: H0: p=0.47. Alternative hypothesis: H1:p>0.47.…

Q: A lobbyist is trying to estimate the true proportion of US adults that support an upcoming bill.…

A: Givenapproximation of p = 0.5Margin of error(E)=0.01confidence level = 95%

Q: this probiem, carry at least lour digits alteer the decimal in your calculadons. Answers may vary…

A: It is given that margin of error (E) is 0.03 and the confidence level is 0.80.

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

A:

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: The personnel director of the Target Corporation wants to estimate the number of employees within…

A: Given that  Sample size n =80 Favorable cases x =4 Sample proportion p^=x/n  =4/80 =0.05

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: 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: A study quoted in The Windsor Star suggested that mathematics should be taught in the afternoon…

A: We have given that,  Confidence interval = 95 % and margin of error (B) = 0.06 Then,  We will find…

Q: The Slayer's Cake Bakery wishes to estimate the proportion of its customers who are repeat customers…

A:

Q: The president of Doerman Distributors, Inc., believes that 34% of the firm's orders come from…

A: The question is about sampling dist. of a prop. Given : Prop. of the firm's orders come from first…

Q: An advertising executive wants to estimate the mean weekly amount of time consumers spend watching…

A:

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

A:

Q: students. You want to estimate the proportion p of students who never floss with 90% confidence and…

A: It is given that Proportion p = 0.27 Margin of error E = 0.03 Level of confidence = 90% The critical…

Q: A hospital administrator wants to estimate the proportion of patients whose hospital stay exceeds a…

A: Given Margin of error=0.06 P-cap=0.5

Q: The number of chocolate chips in an 18-ounce bag of chocolate chip cookies is approximately normally…

A: Given Data: Let X represent the random variable   Mean=1252 SD=129   X~ Normal (1252, 1292)

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: A Plitical pollster wants to know what proportion of voters think james burger should go away and…

A:

Q: USA Today reported that about 47% of the general consumer population in the United States is loyal…

A: Given information n = 997, x= 496, p=0.47

Q: There is a popular lottery in which a ticket is called a scratcher. You are an auditor and want to…

A:

Q: An event marketing executive thinks that the proportion of consumers who have seen his company’s…

A: In general terms, the larger the sample size n, the more precise of an estimate can be obtained of…

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: a sampling plan, when n

A: n = 50, c = 2, N = 500 and p = 0.01 Pr{d&lt;=2}

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: In a sample survey, 138 students failed the exam out of 200 total students.  1. Calculate the 95%…

A:

Q: Determine the sample​ proportion, p, of households that own a Company A product. b. If the…

A: Let , n=total number of households=56 Let , X= be the number of respondents said yes.=14 The…

Q: An advertising executive wants to estimate the mean weekly amount of time consumers spend watching…

A: Given information- Population standard deviation (σ) = 25 minutes Error (E) = 5 minutes The margin…

Q: Ve want to know how many people plan on buying a cell phone this year. Determine the sample size…

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: estimate the population proportion p,what is the minimum sample size we need in order to achieve a…

A: Solution: From the given information, confidence level is 0.95, p=0.1 and E=0.01.

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.