Pierre is a chef. He claims that 90% of his customers are satisfied  with his cooking. Yvette suspect that Pierre it's over confident about the level of sort of satisfaction among his customers. She takes to a random sample of 15 of Pierre's customers and finds that 11 customers say that they are satisfied. she then performs a hypothesis test. carry out the test at the 5% significance level

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A:

Q: It is thought that 47% of respondents in a taste test would prefer Brand A. In a particular test of…

A: Given that  p = 47% , p^ = 44% , n = 250

Q: Professor Fair believes that extra time does not improve grades on exams. He randomly divided a…

A:

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: In this question, It has been given that Margin of error = 0.05 and level of significance = 0.005.…

Q: Nationally, 83% of Americans have earned a high school diploma.  We want to see if the proportion of…

A: Given, Nationally, 83% of Americans have earned a high school diploma.  We want to see if the…

Q: Among college students, the proportion p who say they're interested in their congressional…

A: The proportion of students who say they are interested in their congressional district's election…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A:

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: We surveyed 53 people in an attempt to determine the proportion of Americans who lease a vehicle. 13…

A: The proportion of sample Americans who lease a vehicle is, Thus, the proportion of sample Americans…

Q: Refer to the following scenario. Ah epidemiologist is worned about the prevalence of the flu in…

A: Givenx=39n=334p^=xn=39334=0.116766Margin of error(E)=0.05Confidence…

Q: Out of a group of 50 runner and cyclist, 17 cyclists stated they did not have knee problems and 9…

A: The hypotheses are given below: The claim is that runners experience more knee problems Null…

Q: T.J. wants to estimate the percentage of college students who have taken out student loans. He…

A:

Q: A survey company polls 1,233 voters about whether they plan to vote for the Liberal or the…

A: Sample size 52% of voters prefer the Liberal candidate i.e., Significance level

Q: A multinational firm hired a consultant to determine if the workers in their domestic plants were…

A: Given Information : A multinational firm hired a consultant to determine if the workers in their…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Since you have posted multiple questions, we will provide the solution only to the first question as…

Q: A political candidate has asked you to conduct a poll to determine what percentage of people support…

A: Determine the size of sample is needed. The size of sample is needed is obtained below as follows:…

Q: Becky's statistics teacher was teaching the class how to perform the z-test for a proportion. Becky…

A: Given that becky flipped coin 30 timesNumber of heads = 18level of significance = 0.05Claim : true…

Q: While her husband spent 2½ hours picking out new speakers, a statistician decided to determine…

A:

Q: A television sports commentator wants to estimate the proportion of citizens who​ "follow…

A: Solution: From the given information, confidence level is 0.96 and E=0.02.

Q: You plan to conduct a survey to estimate the percentage of adults who have had chickenpox. Find the…

A: It is needed to find the number of people who must be surveyed if one wants to be 93% confident that…

Q: On average, they report 6.6 hours a week going to parties, and the sample SD (or SD+) is 9 hours.…

A: Let  be the population mean number of hours a week going to parties.Given that,Population mean…

Q: A hypothesis test is conducted to determine whether the percentage of US adults that think marijuana…

A: Given,n=400x=144p^=xnp^=144400=0.36

Q: Among college students, the proportion p who say they’re interested in their congressional…

A: Given:  Among the college students the proportion p who say they’re interested in their…

Q: A reputable polling company reports the results of an opinion poll on a recent news article A social…

A: Sample survey is collecting a data from the population. there are different types of methods of…

Q: Neighborhood 3 1 4 With campaign Without campaign 4.0 3.2 2.5 5.0 2.8 4.0 3.8 4.4 4.3 4.0 Is the…

A: With Without D (D-Dbar)^2 4 4 0 0.36 3.2 3.8 -0.6 0 2.5 4.4 -1.9 1.69 5 4.3 0.7 1.69 2.8 4…

Q: A poll surveyed people about taxing sugar-sweetened beverages. The results are presented in the…

A: State the hypotheses.

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.