In general, when you increase the confidence level for a confidence interval using the same sample proportion and same sample size, does the margin of error increase, decrease or stay the same?  Explain how you made your decision in a sentence.

Q: Global Warming In April of 2014, a Gallup Poll of 1048 U.S. adults found that 25% of the respondents…

A: From the provided information, Sample size (n) = 1048 25% of the respondents were skeptical that…

Q: Explain when you would use the paired-samples procedure to make confidence intervals  and test…

A:

Q: In a recent poll, 410 people were asked if they liked dogs, and 85% said they did. Find the margin…

A: Given that, p^=0.85n=410 Critical value: By using the z-tables, the critical value at 1% level of…

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: 132,000 189,000 270,000 324,800 269,000 340,000 222,000 135,000 169,900 310,000 142,900 86,000…

A: Given information: x 132000 324800 222000 310000 285000 189000 269000 135000…

Q: A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie.…

A: It is given that: p^ (proportion of adults, who lie chocolate pie at the sample level)=11% (i..e,…

Q: Use the information to construct 90% and 99% confidence intervals for the population mean. Interpret…

A: The data shows 32 workers ages 16 years and over who did not work from home and asked how ling it…

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: A student polls his school to see if students in the school district are for or against the new…

A: Given: n=600 and x=480. Then,p^=xn=480600=0.8

Q: You're considering going to graduate school, and you would like to know how many people would…

A: From the provided information Sample size (n) = 29, People who recommend x = 9 The sample proportion…

Q: You plan to construct a 90% confidence interval for the proportion of all middle school students who…

A:

Q: e presidential election process reports many polls. You survey 40 college students and find that 70%…

A: Given data, n=40 p=70%=0.70 Find the 95% confidence interval to estimate the population proportion…

Q: Compute a 98% confidence interval for the true percent of students who are against the new…

A: Given: n=521 Confidence level=98%

Q: Determine the sample size for a on-line survey with a variability of 30% and a 95% confidence…

A: Sample size n=z2(p*q)/e2

Q: For the same sample statistics, which level of confidence would produce the widest confidence…

A:

Q: A survey of 26 individuals found that they spent an average of $39.21 on exercise attire for the…

A: Confidence interval is an inference process which is used to estimate the population parameter. The…

Q: How do you interpret the confidence interval. Select all that apply. We are 95% confident that the…

A: Solution: Given that, sample size n=15, sample mean x¯=0.287 and standard deviation s=0.069 then…

Q: In a recent poll, 130 people were asked if they liked dogs, and 24% said they did. Find the margin…

A: Given, Total number of people = 130 Probability that a person likes a dog = 0.24 z value at 99%…

Q: Emilio wants to estimate the percentage of people who have a financial adviser. He surveys 350…

A: given data  n = 350 x = 76 we have to interprete 99% confidence intervl.

Q: Please help, thank you!

A: Solution: From the given information, p-hat = 18%, margin of error is plus or minus is 2%. That is,…

Q: An interactive poll found that 307 of 2,245 adults aged 18 or older have at least one tattoo. (a)…

A: a). It is given that 307 out of 2245 adults have at least one tattoo. The point estimate of the…

Q: If you are building a 90%, 95%, and 99% confidence interval for the same statistics, which will be…

A: GivenBuilding 90% , 95% and 99% confidence interval for the same statistics

Q: doubling the sample size would have on the width of a one-proportion confidence interval, if the…

A: Answer:- we know that, when we increase the sample size, the width of confidence interval will…

Q: 10. You take a sample of 200 University of Maryland students and find that 80 them think that the…

A: 10. It was stated that a sample of 200 Maryland University students are taken. It was given that…

Q: How

A: solution :  [ option B is correct 1068 ] given data Margin of Error E=0.03 Significance Level alpha…

Q: A magazine provided results from a poll of 2000 adults who were asked to identify their favorite…

A: It is given that among the 2000 respondents, 14% chose chocolate pie, and the margin of error was…

Q: Use the confidence interval to find the margin of error and the sample mean. (0.072,0.210) The…

A: Given Confidence of interval (0.072,0.210)

Q: A researcher asks 600 people if they received a flu vaccine, and 65% said they did. What is the 95%…

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

Q: Several years ago, 41% of parents who had children in grades K-12 were satisfied with the quality of…

A: Followings are the Explanation of the question Use the One sample Z proportion t test and its…

Q: The list below contains a number of statements about using confidence intervals of proportions.…

A: The objective is to find the true statement from the given list.

Q: You and a friend are interested in knowing if two groups have the same proportion of smokers. The…

A: Solution : Given : n1 = nn2 =500             x1 = 490             x2 = 400              α = 0.05…

Q: Briefly discuss the meaning of a 95% confidence interval and a 99% confidence interval and how they…

A: A confidence interval is a range of values that quantifies the uncertainty or level of confidence…

Q: A magazine provided results from a poll of 1000 adults who were asked to identify their favorite…

A: Given Information :  A magazine provided results from a poll of 1000 adults who were asked to…

Q: Several years ago, 50% of parents who had children in grades K-12 were satisfied with the quality of…

A: Given Data Sample Size, n = 1105 Number of successes, x = 491.0 confidence…

Q: A magazine provided results from a poll of 500 adults who were asked to identify their favorite pie.…

A: From the given information, The percentage of chocolate pie is 14%. There are 500 respondents.…

Q: What are the z-scores for 90%, 95%, and 99% confidence?

A: the z-scores for 90%, 95%, and 99% confidence

Q: Translate the statement into a confidence interval. Approximate the level of confidence. In a survey…

A: as per our company guidelines we are supposed to answer only first question. Kindly repost other…

Q: You observe 40 customers at a coffee shop, and 77% of them tip. What is the 95% confidence interval…

A: p=0.77 n=400

Q: Use the sample data and confidence level given below to complete parts (a) through (d). A research…

A: Given; x=561n=935The level of significance is;α=1-0.95=0.05 (a) The best point estimate of the…

Q: You plan to find a confidence interval for the percentage of children who have speech delays. A…

A:

Q: Find the confidence level and a for an 85% confidence interval. What is the confidence level? (Type…

A: Answer:- Given , Confidence interval is, CI =  85%  We know that,  Confidence level (CL) =…

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.