A computer store near campus is stocking its shelves and wants to know the relative proportions of USC undergraduates who use PCs vs Macs. A random sample of 60 USC undergraduates is surveyed, and each student is asked whether they use a PC or Mac more often. 55% select ”PC.” (a)  What is the population and what is the sample in this study? (b)  Calculate a 95% confidence interval for the proportion of USC students that are PC users. (c)  Provide an interpretation of this confidence interval in the context of this problem.

Q: A recent study of high school students shows the percentage of females and males who have at LEAST…

A: The (1-α)% confidence interval for the difference in population proportions p1-p2 is given by;…

Q: A volunteer wearing a caveman mask was scolded by 158 out of 444 crows he encountered, and the crows…

A: Given information, In a study, a volunteer wear a caveman mask scolded by 158 out of 444 crows he…

Q: A random sample of nine students took 18, 19, 13, 24, 22, 21, 22, 17, and 25 minutes to complete the…

A:

Q: Campus athletics is interested in the proportion of registered students living on campus who play…

A: We are given that 95% confidence interval is correctly calculated from the given data as (0.12,…

Q: A 95% confidence interval for the proportion p active voters in the municipality of Aibonito is 0.57…

A:

Q: 1. A survey of 224 children of ages 9 to 17 was conducted shortly after 1986 space-shuttle disaster.…

A:

Q: The General Social Survey (GSS) is a survey administered to a random sample of adult Americans by…

A: given data sample size (n) = 2500favorable outcomes (x) = 725p = proportion of customers that are…

Q: You observe 60 customers at a coffee shop, and 82% of them tip. What is the 95% confidence interval…

A: Given : You observe 60 customers at a coffee shop, and 82% of them tip.

Q: A June 2009 Harris Interactive poll asked people their opinions about the influence of advertising…

A: The value of z at 98% confidnce level is 2.326, which can be obtained by using the standard normal…

Q: 1. In a recent poll 62 out of 149 randomly chosen students at Allen High School say they plan to buy…

A:

Q: A principal of a large high school wants to estimate the true proportion of high school students who…

A: Given information- Sample size, n = 50 For a random sample of 50 students, the 95% confidence…

Q: At a large university in Conway, South Carolina, the Dean wants to know what proportion of students…

A: We have given thatn = 200x = 145Confidence level (c) = 99% = 0.99Significance level (α) = 1 - c =  1…

Q: A large company would like to assess the impact of using a professional trainer to conduct a…

A: We hvae to find corrcet option..

Q: A telephone poll of 1,000 adult Americans was reported in an issue of a news magazine. One of the…

A: A telephone poll of 1,000 adult Americans was reported in an issue of a news magazine. One of the…

Q: one with a 95% confidence level and the other with a 99.7% confidence level. Which interval is…

A: Confidence interval is probability, which refers that population parameter will fall within set of…

Q: A recent survey of 54,000 randomly selected adults studied the religious affiliations of Americans.…

A: From the provided information, Sample size (n) = 645 From which 116 said they claimed no religious…

Q: 1992, the women in two statistics classes for students in the liberal arts at a large northeastern…

A: In 1992, the women in two statistics classes for students in the liberal arts at a large…

Q: The analyst decides to test this assumption by collecting a random sample of 100 New Yorkers and…

A: The sample proportion is, p^=xn=65100=0.65 Computation of critical value:…

Q: The tobacco industry closely monitors all surveys that involve smoking. One survey showed that among…

A: Confidence interval : Confidence interval is a range of values and it contains the true population…

Q: The figure to the right shows the results of a survey in which 999 adults from Country​ A, 1006…

A: Hey, since there are multiple subparts posted, we will answer the first three subparts. If you want…

Q: The County Development Agency does a survey of all the mobile home manufacturers in Clarion County…

A:

Q: A publishing company is studying the sales of various franchises in their chain of stores. A…

A: We are given confidence intervals for the population mean daily sales at 90%, 95%, 97% and 99%…

Q: (a) Find a 95% confidence interval for p1 - P2. (Use 3 decimal places.)

A: (a) A random sample of 336 married couples found that 292 had two or more personality preferences in…

Q: Leana is interested in the proportion of people who live in her area who own a dog. She randomly…

A: Suppose p is the population proportion of people who live within one mile of Person L’s home who own…

Q: You are going to construct a 99% confidence interval for the proportion of hip replacement…

A:

Q: wenty years ago, a very famous psychologist specializing in marriage counseling authored a book…

A: Solution: Given information n= 275 Sample size of couples who bought book. X= 217  stayed together…

Q: In the year 1999, a survey was undertaken to find the salary of employees working in software…

A:

Q: An epidemiologist is worried about the prevalence of the flu in East Vancouver and the potential…

A:

Q: 5. Attending sporting events is a popular source of entertainment. When 1000 people were surveyed,…

A: (5)

Q: The figure to the right shows the results of a survey in which 997 adults from Country​ A, 1022…

A: Given data For country A n = 997

Q: A recent Gallup Poll interviewed a random sample of 1523 adults. Of these, 868 bought a lottery…

A: Margin of error is used to measure the error occurred in the sample. It explains the percentage of…

Q: Sue and Javier are working on a statistics project to estimate the proportion of students at their…

A: Sample size (n)=2400 Sue select 81 sample and Javier select 64   The formula for 100(1-α)%…

Q: A poll commissioned by the Center on Addiction and Substance Abuse at Columbia University found that…

A: Given that, X = 1340 N = 2000 98% confidence level