A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 10% margin of error at a 99% confidence level, what size of sample is needed?

Q: A manager decided that if more than 80% of users are classified as potential buyers, they will…

A: Given that, Percentage of users who are potential users (p) = 80% = 0.80 Explain how would work the…

Q: When the sample size is 15 and you are doing a t test, the number of degrees of freedom is 15. True…

A: Given that  Sample size n =15 Degree of freedom =df =n-1

Q: Suppose the Humane Society claims that 30% of U.S. households own cats. You believe your community…

A: Given: p=30%=0.30n=300p^=23%=0.23

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

A: It is given that margin of error (E) is 0.03 and the confidence level is 99%.

Q: The Pepsi Challenged asked soda drinkers to compare Diet Coke and Diet Pepsi in a blind taste test.…

A: Given that,possible chances (x)=56sample size(n)=100success rate ( p )= x/n = 0.56success…

Q: ting a simple random sample of 1000 people and ask them whether they smoke. 70 people indicate that…

A: The sample proportion is computed as follows,  At 90% confidence level, the z value is 1.645 which…

Q: estimate how many people you would need to survey in order to estimate the percentage in your…

A: here given , Suppose you want to estimate the percentage of employees who want to work from home.…

Q: A researcher wants to estimate the proportion of electric car owners in Los Angeles County. The…

A: According to the given information, we havePopulation proportion, p = 10% = 0.10Margin of error, E =…

Q: You are running a political campaign and wish to estimate, with 95% confidence, the proportion of…

A: Formula for the sample size needed to estimate a population proportion is

Q: Suppose Diana, an educational researcher at a local university, wants to test the impact of a new…

A: By the given conditions,we haveThis is pair t test in which1) She selects a simple random sample of…

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

A: It is given that margin of error (E) is 0.08 and the confidence level is 0.90.

Q: what are the importance of one sample Inference (Z- test and T-test) and provide examples of how you…

A: The One Sample t Test and One Sample z test are parametric tests.    One - sample T-test :  The…

Q: There are 145 people who participate in a training about compassion, and their compassion scores are…

A: In paired t test, it is needed to check the significant difference between two variables of same…

Q: Choose 1 answer: We cannot reject the hypothesis. We should reject the hypothesis. Measured % of…

A: Population proportion = P = 0.90 Sample proportion = p = 0.80 n = 80 Level of significance = α =…

Q: In a survey of 323 adults over 50, 60% said they were taking vitamin supplements. Find the margin of…

A:

Q: If only 15% of people asked to mail in a survey respond, this is an example of

A: Given that  Only 15% of people asked to mail in a survey respond.  We know that  Response bias :…

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

A: Solution

Q: What is the difference between an outcome and sample space

A: An outcome refers to the result of a experiment . Here experiment tends to actions that can have…

Q: My sister and I completed an experiment. she had o guess whether I was looking at her or not. The…

A: Sample size (n)=10Number of success (X)=6We have to find the sample proportion of she correctly…

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

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

Q: b. Which group is more likely to have taken a vacation in the last year: college graduates or…

A: Given data:   Yes No Total College Graduate 183 67 250 Not a College Graduate 126 124 250…

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

A: n = 664Explanation:To calculate the sample size needed for a poll with a specific margin of error…

Q: Please do Part D, E, F, G. The answers for part A,B,C are given to help. QUESTION: A national poll…

A: (d)   Determine whether the 94% confidence interval provides good evidence that the actual…

Q: Mr. Scoville ran for school board last year and got 18% of the vote.  He is running again this year.…

A: From the provided information,Mr. Scoville ran for school board last year and got 18% of the vote…

Q: Researchers at a drug company are testing the duration of a new pain reliever. The drug is normally…

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question…

Q: According the April 12, 2017 Pew Research survey, 58% of Americans approve of U.S. missile strikes…

A: (3) Determine whether the normal approximation can be used with the given distribution or not?…

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

A: Given observation Error = 10% = 0.1 Confidence level = 0.99

Q: The Register Office of UofM wishes to find out whether students prefer "online class" or "in-person…

A: The objective is to choose the type of example of given information.

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

A: Given data,E=4%=0.04letp=0.5z value at 95% confidence is Zc=1.96n=?

Q: 900 voters in the town and found that 70% of the residents favored construction. Using the data, a…

A: The provided information are:

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

A:

Q: Better hiring info Editors of the business report inExercise 30 are willing to accept a margin of…

A: Assume that the population proportion is 0.5. It is known that the critical value for 99% confidence…

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.