Sandra's marketing firm randomly selects 2500 adults living in the tri-state area, and asks each of them whether they percieve the new advertising campaign favorably or unfavorably. Of those sampled, 1272 responsed favorably. Do the sample data indicate signifcant evidence that the majority of all adults living in the tri-state area view the advertising campaign favorably? Test this claim at the 0.05 significance level.

Q: Researchers reported a study in which 396 domestic violence defendants were randomly assigned to…

A: The number of people arrested within 12 months in the counselling group is 48 out of 224.

Q: Past studies have indicated that the percentage of smokers is estimated to be about 33%. Given the…

A:

Q: a study was conducted to determine the proportion of people who dream in black and white instead of…

A: The objective of this question is to test the claim that the proportion of people over 55 who dream…

Q: Newborn babies are more likely to be boys than girls. A random sample found 13,573 boys were born…

A: The claim of the test is there is sample evidence that the birth of boys is more common than the…

Q: Suppose that in a random selection of 100 colored​ candies, 29% of them are blue. The candy company…

A:

Q: In a random sample of 800 adult Americans, 605 of them were nonsmokers.  The following question was…

A:

Q: According to the U.S. Census Bureau, 11% of children in the United States lived with at least one…

A:

Q: Suppose 250 subjects are treated with a drug that is used to treat pain and 50 of them developed…

A: given data clim : p > 0.20n = 250x = 50α = 0.05p^ = xn = 50250 = 0.20

Q: a study was conducted to determine the proportion of people who dream in black and white instead of…

A: The objective of this question is to conduct a hypothesis test to determine if the proportion of…

Q: A researcher seeks to determine whether college seniors are different from freshmen in their…

A: The hypothesis is an assumption that is being tested.

Q: • In a 2019 survey of 560 college students, 171 said they used illegal drugs during the previous…

A: n1=560, x1=171n2=720, x2=263α=0.05 Claim: p1<p2

Q: In a study of brand recognition, 821 of the 849 subjects recognized the Campbell’s soup brand. Use…

A:

Q: In the NFL, Coaches can throw "challenge" flags if they believe officials have made an incorrect…

A: It was stated that in the NFL, Coaches can throw "challenge" flags if they believe officials have…

Q: A local college wants to see if the students in the Psychology department have Ipads at home.…

A: Suppose p is the true population proportion of Psychology students who have Ipads at home.

Q: One survey showed that among 766   randomly selected subjects who completed four years of​ college,…

A: Denote p as the true population proportion of smokers in the college.

Q: In a random sample of missions flown by B-17’s, 38 returned and 24 were lost. In a random sample of…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: The National Football League (NFL) is conducting a survey of fan behavior by collecting a random…

A: Null and alternative hypotheses: The investigator is specifically interested to test whether the…

Q: A community is considering raising funds to pay for iimprovements to the community swimming pool. To…

A: In a voluntary response sample, the respondents select themselves into the sample, by volunteering…

Q: The Wall Street Journal Annual Corporate Perceptions Study surveyed readers and asked how each rated…

A: Given Information :  The Wall Street Journal Annual Corporate Perceptions Study surveyed readers and…

Q: According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft,…

A:

Q: A company claims that less than 30% of people who both work and live in Newcastle. A study revealed…

A: p̂=x/n,  X=62, n=200, p=0.30 we want to test the hypothesis

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.