A Pew Research Center report on gamers and gaming estimated that 49% of U.S. adults play video games on a computer, TV, game console, or portable device such as a cell phone. This estimate was based on a random sample of 2001 U.S. adults. Construct and interpret a 95% confidence interval for the proportion of all U.S. adults who play video games

Q: According to the same Pew Internet study, 8% of those with broadband connections are using fixed…

A: The p-value of the test is 0.103. The decision is fail to reject H0.

Q: A June 2020 Angus Reid poll of 1510 Canadian adults found that 53% support the idea of a 30 hour…

A: Given Data: p^=0.53n=1510   z-value corresponding to 95% Confidence level=1.96

Q: A research group studying cell phone habits asked the question “Do you ever use your cell phone to…

A:

Q: What is the relationship between confidence intervals and hypothesis testing? When testing Ho: μ =…

A: Given: Confidence interval=90% Level of significance, a= 1-0.90=0.10

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Q: An organization advocating for health care reform has estimated the average cost for health care of…

A: Given : sample mean, x̄ = 13000  Margin of error , E = 1000

Q: According to Scarborough Research, more than 85% of working adults commute by car. Of all U.S.…

A: Given that, According to Scarborough Research, more than 85% of working adults commute by car. Of…

Q: In a study of 200 accidents that required treatment in an emergency room, 80 occurred at work. Find…

A: Obtain the 90% confidence interval for the true proportion of accidents that occurred at work. The…

Q: In a recent Dew Research Poll, 500 U.S. adults were asked about their online versus in-store clothes…

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Q: Generally speaking, what is the difference between a confidence interval and a prediction

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Q: In a Gallup Poll of 1005 individuals, 452 thought they were better off financially than a year ago.…

A: Given; p=452n=1005 95% confidence interval is given by- p^±z×p^(1-p^)n true proportion is given as-…

Q: The results of a recent poll on the preference of teenagers regarding the types of music they listen…

A: We have given that,  X1= 448, n1= 800 and X2 =585, n2 = 900 Then,  We will find the 95% confidence…

Q: The International Nanny Association (INA) reports that in a sample of 928 in- home child care…

A: Solution: A. Let X be the number of number of nannies who have passed the INA certification exam and…

Q: Find the margin of error for the given confidence level.

A: Margin of error :  In a confidence interval, the range of values above and below the sample…

Q: In a study of 120 randomly selected families, 50 said they streamed their television content. Find…

A:

Q: A Gallup Youth Survey in 2001 found that of 501 randomly selected teenagers in the U.S., 271 of them…

A: Given Total number of teenagers selected = 501Number of teenagers said who get along with their…

Q: Vitamin​ D, whether ingested as a dietary supplement or produced naturally when sunlight falls upon…

A:

Q: In a study of 150 randomly selected accidents that required treatment in an emergency room, 36%…

A:

Q: What is the effect of sample size on the width of a confidence interval?

A: If the sample size is increased, then the corresponding margin of error is decreased. Hence, the…

Q: In September 2011, Gallup surveyed 1,004 American adults and asked them whether they blamed Barack…

A: It is given that sample size (n) is 1004 and p-hat value is 0.53.

Q: b. Construct a confidence interval suitable for testing the claim that the mean IQ scores for…

A: b. Here, medium lead level is the first sample and high-level lead is the second sample.   The…

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A: Given Information: Smokers: n1=150 x1=95 Nonsmokers: n2=250 x2=105 Confidence level is 95%

Q: In the Framingham Offspring study 3630 subjects were on anti-hypertensive medication out of 4657…

A: Note: Hi, thank you for the question. As per our company guideline we are supposed to answer only…

Q: In an article in Marketing Science, Silk and Berndt investigate the output of advertising agencies.…

A: Givenx=115n=390p^=xn=115390=0.2949confidence interval = 90%

Q: The following table shows the results of a survey in which 1017 adults from the United States, 1060…

A: (1)

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A: From the provided information Sample size (n) = 600 65% said they received a flu vaccine that is…

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A: Given,   Group 1 Group 2   593.59 482.81 mean 160.70 181.23 std. dev. 17 16 n

Q: A high school counselor is interested in determining factors that contribute to high school drop out…

A: Solution; Given information: n1=41 Sample size of high school  graduatesn2= 38 Sample size of high…

Q: 2. In a survey of 1024 US adults, 287 said that their favorite sport to watch is football. a. Find a…

A: It is given that the survey contains 1024 US adults and the number of US adults who favorite sport…

Q: in a random sample of 192 college students, 129 had part-time jobs. Find the margin of error for the…

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Q: Which of the following does NOT have an affect on the width of a confidence interval? Group of…

A: We know that, width = 2× (Margin of error ) So, width =2×z*standard error. So, width =2×z*×σn Where…

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A: (a) The sample proportion of Quebec adults who would allow doctor-assisted suicide is, The critical…

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A: It is given that the confidence interval in b is calculated correctly.

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

Q: Exercise 3 An employment counselor found that in a sample of 100 unemployed workers, 65% were not…

A: Given that : 1) sample size = 49  Mean = $ 23.45 S. D = $ 2.80 90% confidence interval.

Q: In a survey on downloading music, a poll asked 714 Internet users if they "ever downloaded music…

A:

Q: The table shows the results of a survey in which separate samples of 400 adults each from the East,…

A: Given : n = 400 p̂= 0.26

Q: in a recent survey of 1000 adults ages 18 to 40, 34% said they had no credit cards. find the 95%…

A: The sample size n=1000. The sample proportion is 0.34. The confidence level is 95%. The area between…

Q: b. Construct a 90% confidence interval for the percentage of all judges who are in favor of the…

A: a. A random sample of 15 judges and asked them whether or not they favor the death penalty in which…

Q: What is the relationship between confidence intervals and hypothesis tests?

A: Confidence Interval:Confidence interval is the interval estimate of the population parameter. It is…

Q: The dean of students at a large college is interested in learning about their opinions regarding the…

A: Experiment is the study used to understand something about the population. In an experiment,…

Q: The z value for a 96.6% confidence interval estimate is?

A: z value for a 96.6% confidence interval estimate is?

Q: The Pew Internet and American Life Project (A-13) reported in 2003 that 18 percent of Internet users…

A: INTRODUCTION :  Sample proportion : Suppose we draw a sample from population with sample size n. Let…

Q: What two conditions will result in the use of the student-t distribution when constructing a…

A: Confidence interval for mean: When the sample size is large (n>30) and population variance (or…

Q: A career counselor wants to understand if the average annual earnings differ by educational…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub- parts for…

Q: An airline transports over 10 000 passengers daily, and the airline is curious what proportion of…

A: Critical value: Using Excel formula "=NORM.S.INV(1-(0.1/2))", the z-value is obtained as 1.645.

Q: confidence interval for the true proportion

A: We have to find out the confidence interval for the true proportion.

Q: In a study by Sallie Mae and Gallup, 323 of the 569respondents said that they paid for their…

A:

Q: Vitamin​ D, whether ingested as a dietary supplement or produced naturally when sunlight falls upon…

A: Given that, proportion, p= 20% = 0.20 So q= 1-p= 1-0.20 = 0.80 Sample size, n= 3000 Z at 98% is…

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.