According to a poll taken in a certain​ country, when adults were asked whether they were​ thriving, struggling, or​ suffering, 193 out of 440 said they were struggling. a. What is the value of p​, the sample proportion that say they are​ struggling? b. Check the conditions to determine whether you can apply the CLT to find a confidence interval. c. Find a​ 95% confidence interval for the population proportion that say they are struggling.

Q: In a recent poll, 460 people were asked if they liked dogs, and 94% said they did. Find the margin…

A: Ans - Given   P  =  94%    = 0.94,     The sample size  n = 460 people          95%  confidence…

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: In your work for a real estate company, you find that in a sample of 1762 home buyers, 722 found…

A: Given Data: x=722 n=1762   p^=7221762=0.4098

Q: When 460 junior college students were surveyed, 100 said they have a passport. Construct a 95%…

A: Given that there are 460 junior college students and 100 said they have a passport. That is, n=460…

Q: Determine the margin of error for the confidence interval for the proportion: 0.509<p<0.845 The…

A: The given confidence interval is about population mean. We have to find the margin of error. Margin…

Q: When constructing a confidence interval, if we construct a confidence interval with a 95% confidence…

A: The general formula for the width of the confidence interval is,

Q: Refer to the data set of 20 randomly selected presidents given below. Treat the data as a sample and…

A: The following data is given, PRESIDENT HEIGHT OPP. HEIGHT Harrison 173 168 Hayes 173 178…

Q: In a survey, people were asked whether they thought sun went around the planet Earth or vice versa.…

A: (a)   Obtain the proportion of people in the survey who believed the sun went around earth. The…

Q: 3. In a survey of 209 Montana residents, 61 reported their financial status was worse than a year…

A: (a) Computing the point estimate of population proportion:The point estimate of population…

Q: n a survey of 500 students, 180 students said that they prefer classes on Mondays and Wednesdays…

A:

Q: Find the margin of error for the given confidence level.

A: Margin of error :  In a confidence interval, the range of values above and below the sample…

Q: If n = 200 and p^ = 0.64, find the margin of error at a 95% confidence level.

A:

Q: For a confidence level of .90, what is the significance level?

A: We have find significant leval..

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: If n=160 and ˆp (p-hat) =0.48, find the margin of error at a 99% confidence level

A: Given Data: p^=0.48n=160   We know that, p^-pp^(1-p^)n~ Normal(0,1)

Q: 11. A television station surveys 200 customers and finds that 23% of customers watch the evening…

A: Margin of error = z*√(pq/n) Where z= z value            n=no of customer            q=1-p…

Q: packer produces 1,200 packages of ham per shift, how many packages should the Quality Control area…

A: To find the confidence level of 95%.

Q: In a recent poll, 240 people were asked if they liked dogs, and 32% said they did. Find the margin…

A: Find z-critical value:…

Q: Do People Think the Sun Goes around the Earth? In the 2018 General Social Survey, people were asked…

A: According to our policy we can answer only first three part for remaining please repost the…

Q: If the alpha level is .05, then the confidence level is ?

A: Given: alpha = 0.05 confidence level / significant level = 1 - alpha

Q: If n=570 and ˆpp^ (p-hat) =0.8, find the margin of error at a 95% confidence level

A: given that, n = 570 p^=0.8 confidence level = 95%

Q: Determine the margin of error for the confidence interval for the proportion: 0.575 <p<0.722

A:

Q: In June 2020, a Gallup Poll asked U.S. adults whether immigration was a good thing or a bad thing…

A: Given X=600 n=1000

Q: use the given sample data and confidence level. In each case, (a) find the best point estimate of…

A:

Q: Out of 500 people sampled, 455 had kids. The best point estimate for p is . The margin of error…

A:

Q: The crWhat is the criti€cal value, zc , used for constructing a 96% confidence interval for a…

A: The confidence level is 96%. The level of significance is 0.04. The critical value is  Zc=2.054…

Q: A regional survey of 561 companies asked the vice president of operations how satisfied he or she was…

A:

Q: a. Given that Emily used a coin toss to select either her right hand or her left​ hand, what…

A: a. Given that Emily used a coin toss to select either her right hand or her left​ hand, what…

Q: Use the given confidence interval to find the margin of error and the sample mean. (71.7, 87.3)

A:

Q: Use the given confidence interval to find the margin of error and the sample mean.  (4.81, 8.09)

A: The confidence interval is given by (4.81, 8.09)

Q: 3. Aresearcher wants to estimate the daily expenses of college students. He wants a 99% confidence…

A:

Q: n 2013, the Gallup poll asked 1,039 American adults if they believe there was a conspiracy in the…

A: Given data, n=1039 x=634 sample proportion p=x/n =634/1039 =0.61   z-value at 90% confidence is…

Q: A survey​ asks, "If the husband in a family wants​ children, but the wife decides that she does not…

A: We have to create 99% confidence interval for the population proportion.

Q: 19) A political survey had a margin of error of 4.25%. If the surveyor used a 90% confidence level…

A: Assume p-hat as 0.5, since no preliminary estimate is available.

Q: a) How large a sample is required to obtain a 95% confidence interval with a margin of error of 2…

A: Given that  Sample standard deviation s=7.5 But here i m using estimated standard deviation ?=7.5…

Q: In a survey on downloading music, a poll asked 714 Internet users if they "ever downloaded music…

A:

Q: A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll,…

A: Given data n=1026 x=520 confidence interval=95%

Q: If n=570 and ˆpp^ (p-hat) =0.89, find the margin of error at a 95% confidence levelGive your answer…

A: It is given that the value of n is 570, p hat is 0.89 and the confidence level is 0.95.Here,

Q: identify the population proportion, the value of margin of error E, and construct the confidence…

A:

Q: a) Using a sample size of 75, construct a 95% confidence interval estimate of the mean birth weight…

A: here given ,  A study has been conducted to verify the mean of birth weight at Apple County. From…

Q: How many subjects would be needed to ensure that a 95% confidence interval estimate of BMI had a…

A: Given data set is28,21,37,38,24,28,38,47,27,32,36,43sample size(n)=12confidence level=95%Margin of…

Q: Suppose you want to construct an 80% confidence interval for the proportion of businesses that…

A: Given:Margin of Error (E)=3.5%=0.035   For Confidence level 80%, the significance level (α) is…

Q: A school administrator wants to know what proportion of the approximately 80,000 teachers in their…

A: Given: x=55n=100

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

A:

Q: c) i: Calculate the average and median to the results. ii: Find a 95% confidence interval for µ.

A: S.no. x (x-xbar)^2 1 11.79 0.03092 2 11.82 0.02127 3 11.87 0.00918 4 11.92 0.00210 5 11.93…

Q: According to a poll taken in a certain​ country, when adults were asked whether they were​ thriving,…

A: Sample size (n) = 439 240 of them said that they were struggling that is x = 240. The sample…

Q: Aston’s Career Service wants to find out what proportion of Aston’s students work in a part-time…

A: From the given information, Population proportion = p = 60% = 0.60 Margin of error = E = 4% = 0.04…

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: In a study by Sallie Mae and Gallup, 323 of the 569respondents said that they paid for their…

A:

Q: If n=360 and ˆp(p-hat) =0.69, find the margin of error at a 95% confidence level

A:

Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative parameter being estimated. According to the actual definition of bias, it refers to the tendency of a statistic to overestimate or underestimate a parameter.