A poll finds that 51​% of the population approves of the job that the President is​ doing; the poll has a margin of error of 88​% ​(assuming a​ 95% degree of​ confidence).   a. What is the​ 95% confidence interval for the true population proportion that approves of the​ President's performance?   b. What was the minimum size of the sample for this​ poll? a. Find the ​95% confidence interval.   _____<p<______ ​(Round to two decimal places as​ needed.)

Q: d the sample size needed to estimate the percentage of adults who can wiggle their ears. Use a…

A: Margin of error E=4%=0.04C.I=95%=0.95

Q: You are a manager for a local convenience store. You want to determine what proportion of your…

A: We have given that,  Margin of error (E) = 5.50% and confidence level = 90% Then,  We will find the…

Q: Use the given confidence interval to find the margin of error and the sample mean. .734, .760

A: From the given information, the confidence interval is (0.734, 0.760). It can be expressed in,

Q: A poll reported that only 408 out of a total of 1549 adults in a particular region said they had a…

A: (a) Obtain the 95% confidence interval for the proportion that express a great deal or quite a lot…

Q: standard deviation is $17.40.

A: We have given that  Sample size n =55 Sample mean =136 Standard deviation =17.40

Q: Out of 600 people sampled, 402 had kids. Based on this, construct a 90% confidence interval for the…

A:

Q: Out of 400 people sampled, 336 preferred Candidate A. Based on this, estimate what proportion of the…

A:

Q: Out of 300 people sampled, 45 had kids. Based on this, construct a 90% confidence interval for the…

A:

Q: In a survey of 3700 TV viewers, 834 said they watch network news programs. Find the margin of error…

A: Solution

Q: The manufacturer claims that your new car gets 28 mpg on the highway. You suspect that the mpg is a…

A: From the provided information, Sample size (n) = 54 Sample mean (x̅) = 29.2 Standard deviation (s) =…

Q: Suppose you decide that you want to construct a 93% confidence interval. Which one of the following…

A: Given : confidence level, c = 93 %

Q: In a survey of 3250 adults aged 57 through 85 years, it was found that 84.7% of them used at least…

A: Given: Sample size (n) = 3250 Proportion (p) = 0.847

Q: To estimate the proportion of smoker a sample of 100 men was selected. In the selected sample, 40…

A:

Q: Assume that a sample is used to estimate a population p. Find the margin of error M.E. that…

A:

Q: Out of 600 people sampled, 270 preferred Candidate A. Based on this, estimate what proportion of the…

A: Given information: The sample size is n=600. Let x be the number of people who preferred Candidate…

Q: ccording to the data, calculate a 90% confidence interval for the sample mean. What was the T Score…

A: Solution: n= 30 Sample size ∑xi=642 x=∑xin=64230=21.4 Sample mean s2=∑(xi-x)2n-1=56.52414 Sample…

Q: The degrees of freedom for the comparison of two sample means in a testing hypothesis with 13, n2 =…

A:

Q: sted in constructing a 98% confidence interval for the proportion of samples of DNA evidence that…

A: Given, c=98% p^=xn=9651000=0.965 α=0.02

Q: A Gallop Poll in 2015 found that 75% of respondents believed in an afterlife, 15% were not sure or…

A: Given Information :  A Gallop Poll in 2015 found that 75% of respondents believed in an afterlife,…

Q: In a survey of 2587 adults in a recent​ year, 1241 say they have made a New​ Year's resolution.…

A: From the provided information Sample size (n) = 2587 1241 say they have made a New​ Year's…

Q: What management interpretation would you give for a 95% confidence interval calculated for the mean?…

A: The confidence interval is the measure with with we try to get the interval on the population…

Q: You are interested in finding a 90% confidence interval for the mean number of visits for physical…

A: a. Since the population standard deviation is not given, then a t-distribution would be appropriate…

Q: Suppose someone wanted an 75%-confidence interval. What value of z should they use? Choose the…

A: Level of significance ɑ=0.25

Q: In a survey of 299 randomly selected gun owners, it was found that 80 of them said they owned a gun…

A: From the provided information, Sample size (n) = 299 Out of which 80 said they owned a gun primarily…

Q: In a survey of 2009 adults in a recent year, 1263 say they have made a New Year's resolution.…

A:

Q: A national health organization says that 30% of teenagers have tried smoking cigarettes. A health…

A: given data N =3500n = 280x = 56claim : p = 0.30

Q: USE THE INFORMATION BELOW TO ANSWER QUESTIONS 4 THRU 6 In 2020 researchers took random samples to…

A: Givenconfidence interval is (0.013 , 0.049)conficence level = 96%

Q: An educator wants to construct a confidence interval for the proportion of elementary school…

A: Let  be the proportion of elementary school children in Colorado who are proficient in…

Q: In a survey of 2273 adults, 709 say they believe in UFOs. Construct a 95% confidence interval for…

A: Answer:- Given, Sample size, n = 2273 Number of successes on sample, x = 709Confidence level, C =…

Q: medicine. In a recent survey, 2500 teenagers are asked whether or not they use that particular…

A:

Q: Construct the confidence interval for the population mean for the number of hours that students…

A: To calculate: The 97% confidence interval.

Q: Out of 200 people sampled, 36 had kids. Based on this, construct a 99% confidence interval for the…

A: Givenx=36n=200p^=xn=36200=0.18Confidence Interval(c)=99%α=1-0.99=0.01α2=0.005Critical…

Q: Out of 600 people sampled, 456 had kids. Based on this, construct a 95% confidence interval for the…

A: According to the given information, we have Total number of people sampled = 600 Out of 600 people…

Q: ut of 600 people sampled, 300 preferred Candidate A. Based on this, estimate what proportion of the…

A: Given data, Out of 600 people sampled, 300 preferred Candidate A Construct 90% confidence level?

Q: Assume that the following samples are independent. In a random sample of 400 women, 47% favored…

A: Obtain the 98% confidence interval for the difference between the population proportions.   The 98%…

Q: A study done by researchers at Alfred University concluded 70% of the 4380 student athletics who…

A:

Q: A&amp;B&amp;C&amp;D

A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…

Q: Out of 200 people sampled, 176 preferred Candidate A. Based on this, estimate what proportion of the…

A: Numer of people sampled (n) = 200 Number of people who preferred candidate A (x) = 176 Find…

Q: ou are interested in constructing a 95% confidence interval for the proportion of all caterpillars…

A: Solution: Given information: n= 409 Sample size of caterpillars  x= 58  caterpillars become…

Q: Which of the following statements is correct about confidence intervals?

A: (A)  Incorrect  Since, on increasing the confidence level, the error bound increases. As one has to…

Q: It is possible all of these intervals are in- correct. For example, if v = 100 then ev- ery interval…

A:

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.