We are interested in finding out what proportion of borrowers default on a credit card loan. We sample 100 credit card loans. We find that 30 default. (A) Find the proportion of credit card borrowers that default (B) Construct a 95% Confidence Interval. (C) Construct a 99% Confidence Interval

Q: In a survey of 1007 parents of children ages 8-14, 75% say they are willing to get a second or part…

A: The survey of 1007 parents of children 75% say they are willing to get a second or part time job…

Q: Why does increasing the confidence level result in a larger margin of error?

A: We know that the Margin of error is directly proportional to the test statistic's critical value,…

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

A: Sample size:The minimum sample size for a desired confidence level, α with a given margin of error,…

Q: A random sample of 50 employees of a large company was asked the question, "Do you participate in…

A:

Q: A university dean is interested in determining the proportion of students who receive some sort of…

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

A:

Q: The confidence interval was (41%, 45%) What was the margin of error? +/- % What was the summary…

A:

Q: 5.From a sample of 1,000 college students, 28% watch the Super Bowl game each year. Find the margin…

A:

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

A: GivenMargin of Error(E)=0.03Confidence Interval(c)=90%Let p^=0.5α=1-0.90=0.10α2=0.05zα2=z0.05=1.6449…

Q: What is the one exception to using the z score for confidence intervals?

A:

Q: In a random sample of 100 voters in a school district, 40 of them stated they were in favor of the…

A: Solution: Let X be the number of voters stated they were in favor of the school district bond…

Q: What are the conditions for a confidence interval?

A: A confidence interval tells the possible range around the estimate and also how stable the estimate…

Q: A university dean is interested in determining the proportion of students who receive some financial…

A: The point estimate=p^=118200=0.59n=sample size= 200z=critical value of 95% confidence…

Q: 1. How is the expected length of a confidence interval related to the margin of error?

A: here use basic of confidence interval

Q: 11) In a Gallup poll, 1011 adults were asked if they consume alcoholic beverages and 64% of them…

A: (11) Obtain the 90% confidence interval estimate of the proportion of all adults who consume…

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

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

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

A:

Q: How does the central limit theorem play into confidence intervals and  hypothesis testing?

A: To perform confidence intervals and hypothesis testing, it is necessary that the data should be…

Q: In a recent poll, 560 people were asked if they liked dogs, and 22% said they did. Find the margin…

A: For 95% confidence intervalα=1-CI=1-0.95=0.05So, zα2=z0.052=z0.025=1.96

Q: A university dean is interested in determining the proportion of students who receive some sort of…

A:

Q: A random sample of 50 employees of a large company was asked the question, "Do you participate in…

A:

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

A:

Q: What is the margin of error for a 90% confidence interval?

A: It is given that Sample size n = 850 Number of residents support property tax, X = 410 The critical…

Q: 4. A market-research firm asked 300 people about their shampoo-purchasing habits. Fifty-five people…

A:

Q: In a recent poll, 260 people were asked if they liked dogs, and 67% said they did. Find the margin…

A: Given: p = 67%=0.67 n= 260 The value of z at a 90% confidence level is 1.645, which can be found by…

Q: 1. A recent (June 11,2018) Gallup poll found that 48% of Americans identify as pro-choice on the…

A:

Q: Why is a 99% confidence interval wider than a 95% confidence interval?

A: The confidence interval formula is sample statistic±Margin of error. The margin of error is the…

Q: A university dean is interested in determining the proportion of students who receive some sort of…

A: Given that, X = 118 N = 200 99% confidence level

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

A: Given Information:  Margin of error (e) = 10%  Confidence level = 90%  The z score at 90% confidence…

Q: An online seller of Yema Cake, surveyed several customers. Fifty-two percent (52%) of the customers…

A:

Q: A university dean is interested in determining the proportion of students who receive some sort of…

A:

Q: What is the difference between a prediction interval and a confidence​ interval? And when is it…

A: Confidence Interval :  Confidence intervals tell you how well you have determined a parameter of…

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: In a recent poll of 200 randomly selected adults in the U.S., 130 were registered to vote. a) What…

A: Hello, thanks for your question. Since you have posted a question with multiple sub-parts, we will…

Q: In a taste comparison test, it was found that 56 of the 100 persons in a sample preferred the chunky…

A:

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: university dean is interested in determining the proportion of students who receive some sort of…

A:

Q: A college administrator is interested in determining the proportion of students who receive some…

A:

Q: Wildlife biologists inspect 200 deer taken by hunters and find 45 of them carrying Lyme disease…

A: Given; x=45n=200Then the sample proportion is given by;p^=45200=0.225The level of significance…

Q: A poll asked the question, "What do you think is the most important problem facing this country…

A: Given information- Point estimate, p = 0.25 Margin of error  = 0.04 Confidence level, c = 0.95 We…

Q: In a recent poll, 410 people were asked if they liked dogs, and 44% said they did. Find the margin…

A: n = 410 p^=0.44 Confidence interval = 95%

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

A: The formula for the sample size is as follows:

Q: How can you make a 95% confidence interval smaller without changing the confidence level?

A:

Q: If a retailer would like to estimate the proportion of their customers who bought an item after…

A: Solution: 3. From the given information, confidence level is 0.90 and E=0.03.

Q: In a past presidential election, 36,523,493 people voted for Candidate A; 36,417,321 for Candidate…

A: The appropriate interpretation is to be made considering the proportion of votes for candidate A.

Q: Why would manufacturers or businesses be interested in constructing a confidence interval for the…

A: For some small value of α we determine confidence limits c1 and c2 such that: P(c1< θ <…

Q: What is the value of for a 98% confidence interval at 14 degrees of freedom?

A: We have to find critical value for given data...

Estimation

A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.