How many people should be surveyed to construct a 95% confidence interval with error = 3% to estimate the population proportion of people who have seen a UFO if it is estimated 15% of people have seen a UFO

Q: You wanted to know how long on average a business student at your university studies per night. You…

A: Given data is 2,1,3,2,4,1,0,3,2,4sample size(n)=10

Q: You're considering going to graduate school, and you would like to know how many people would…

A:

Q: You are a manager for a local convenience store. You want to determine what proportion of your…

A: We have given that,  Margin of error (E) = 5.50% and confidence level = 90% Then,  We will find the…

Q: A media research group uses samples of 3500 households to rank TV shows. The group reported that a…

A: It was stated that a media research group uses samples of 3500 households to rank TV shows. The…

Q: You and a friend are interested in knowing if two groups have the same proportion of smokers. The…

A: 1. In the given situation, the proportions of two groups are comparing. The suitable test for…

Q: 1. When we construct a 90% confidence interval, we say that “we are 90% confident that the true…

A: 1. By this phrase we mean that if we collect a large number of different samples of the same size…

Q: You will be applying what you have learned in this course by gathering data and running a…

A: C) Here X¯=66.78 and σ=4.5 C.I. = X¯±z×12σn C.I. = 66.78 ± 1.96 ×4.59 C.I. = 66.78 ± 2.94  C.I. =…

Q: What value is estimated with a confidence interval using the t statistic?​ Group of answer choices…

A: When we are using t-statistic we use tn-1,α/2 = Upper (α/2)-th percentile of t distribution. We use…

Q: What management interpretation would you give for a 95% confidence interval calculated for the mean?…

A: Given options are : a. With an infinite number of samples, there is a 5% chance that the population…

Q: A telephone poll of 818 adult Americans was reported in an issue of Time Magazine. One of the…

A: Given P=0.39 Alpha=0.07

Q: To devise effective marketing strategies it is helpful to know the characteristics of your…

A: Givensample size(n)=932x=543p^ =xn=543932=0.5826Confidence level(c)=95%α=1-0.95=0.05α2=0.025critical…

Q: A Consumer Reports survey found that 205 people out of 325 surveyed prefer to purchase books online.…

A: a)

Q: You plan to conduct a survey to find out the proportion of students who enjoy taking classes…

A: Given  The margin of error is given as m=0.02 At a 90% confidence interval, α=0.1 As the proportion…

Q: n a survey, the planning value for the population proportion is p*=.25 . How large a sample should…

A:

Q: Heather runs a successful lawn-mowing business. She would like to estimate the true mean amount of…

A: Given that  Sample size n =30 90 % confidence interval is (40 , 55)

Q: 3. You plan to conduct a survey to find out what proportion of the workforce has two or more jobs.…

A:

Q: A toy store would like to open a new store in the city of Thousand Oaks, and they would like to know…

A: To construct 99% confidence interval.

Q: Translate the statement into a confidence interval. Approximate the level of confidence. In a survey…

A:

Q: Suppose someone wanted an 75%-confidence interval. What value of z should they use? Choose the…

A: Level of significance ɑ=0.25

Q: there are many reasons adults use credit cards. A recent survey found that 58% of adults used credit…

A: A recent survey found that 58% of adults used credit cards for convenience. p = 0.58 a) to conduct a…

Q: what will the margin of error be?  Choose the answer that is closest to what you calculate, and try…

A: We have given that  Favourable cases, X = 51 Sample size, n = 85 Sample proportion, p^ = X/n…

Q: If n = 15, the sample mean = 150, SD = 10, what is the confidence interval (using 99% confidence…

A: Given data,n=15x=150σ=10z-value at 99% confidence is Zc=2.576

Q: A survey asked, "How important is it to you to buy products that are made in America?" Of the 600…

A:

Q: About 74% of MCC students believe they can achieve the American dream and about 65% of Ferris State…

A: The provided data is,

Q: Researchers would like to construct a confidence interval to estimate the proportion of adults who…

A:

Q: Deborah wants to estimate the percentage of people who eat fast food at least once per week. She…

A: Margin of error is usually computed using the formula below.  In this question, Margin of error is…

Q: You're considering going to graduate school, and you would like to know how many people would…

A: Given: X= 6, N=28. Therefore, P=XN=628=0.214

Q: Suppose we wanted to estimate the average amount of sleep (in hours) a college student gets a night.…

A: GivenTo estimate the average amount of sleep( in hours)

Q: Which of these statements correctly interprets what it means to be "95% confident"? Choose the…

A: It is an important part of statistics . It is widely used .

Q: A media research group uses samples of 6000 households to rank TV shows. The group reported that a…

A: Given that: n=6000 p=19%=0.19 q=1-p=0.81 95% confidence interval

Q: The concept of a confidence interval for a population proportion is similar, but the math is a…

A: We have given thatn = 240x = 48

Q: A recent poll of 960 Facebook users posed the following question: "Thinking just about your Facebook…

A: Hi! Thank you for the question, As per the honour code, we are allowed to answer three sub-parts at…

Q: In a survey, people were asked whether they thought sun went around the planet Earth or vice versa.…

A: a. It was found that out of the 2152 people, 389 thought the sun went around earth. The sample size…

Q: What is the probability for a z-score of 1.597 What is the confidence interval for a study if the…

A: Given data: 1.What is the probability for a z-score of 1.597 2.What is the confidence interval for a…

Q: To study about the relationship between height and the weight, you need to collect a sample of nine…

A: Note: Hi there! Thank you for posting the question. As your question has more than 3 parts, we have…

Q: A magazine provided results from a poll of 2000 adults who were asked to identify their favorite…

A: If confidence level is 90% then α=?p

Q: How's the economy? A pollster wants to construct a 95% confidence interval for the proportion of…

A: Given dataError = 3% = 0.03Confidence level = 0.95

Q: One year’s survey results, of 1525 respondents, 846 said that they expected difficulty finding a…

A:

Q: An experiment was performed on ten college students to determine the effect of a certain drug on the…

A: sample size (n) = 10 mean =  Σd/n           = -12/10        = -1.2

Q: The individual object in the study was a randomly selected _____. This is computer-graded so…

A:

Q: How many soldiers should Haley sample?

A: It is given that Proportion = 79% = 0.79 Margin of error E = 0.005 Confidence level = 93% The…

Q: Debbie and Ethan are going to construct confidence intervals from the same simple random sample.…

A: Given information Two confidence interval 98% and 95% Debbie’s confidence interval 98% Ethan’s…

Q: Estimate of the proportion p for a 95% confidence with a sample size ? = 400 and point estimate ?̂=…

A: Givensample size(n)=400point estimate(p^)=0.4confidence level=95%

Q: Tonya wants to estimate what proportion of her school’s seniors plan to attend the prom. She…

A:

Q: A researcher was commissioned to find out the proportion of students who use mobile phones in online…

A: The confidence interval is the interval in which the population parameter is likely to fall. Let X…

Q: A dermatologist believes that cancers of the head and neck will occur most often of the left side in…

A:

Q: Refer to the accompanying stayed outside and construct a 90% confidence interval as many of the mean…

A: We have, CI = xbar +/- sigma/sqrt(n)

Q: you to buy products that are made in America?" of the 600 Americans surveyed, 450 responded, "It is…

A:

Q: Decide if the following statement is true or false and explain your reasoning: Suppose you found a…

A: Correct option: True

Q: Amagazine provided results from a poll of 500 adults who were asked to identify their favorite pie…

A: