In a Harvard School of Public Health survey, 2105 of 10,904 randomly selected U.S. college students were classified as abstainers (nondrinkers). a. Estimate with 99% confidence the true proportion of U.S. college students that are classified as nondrinkers. b. A newspaper article claims that 25% of U.S. college students are nondrinkers. Based on your confidence interval, is the claim true or false?

Q: 10.24 Customer preferences for your new product. A sample of 60 potential customers was asked to use…

A: Given :  n = 60 x = 40

Q: A university dean wants to estimate the percentage of students at her university who drink alcohol…

A:

Q: A poll asked adults in a certain country whether immigration was a good thing or a bad thing for the…

A: Define p as the true population proportion of adults in the country who think immigration is a good…

Q: joint USA Today/CNN/Gallup Poll in July 2020 indicated that of 832 white adults, 46% thought…

A: Given n=832 P=0.46

Q: Sixty-five percent of the human population has some form of lactose intolerance. As part of your…

A: We want to find the 90% confidence interval

Q: A polling agency conducted a survey by selecting 100 random samples, each consisting of 1,200 United…

A: The objective of the question is to understand the correct interpretation of a 95% confidence level…

Q: In a random sample of 1003 US adults, 32% said that national identity is strongly tied to birth…

A: It is given that, 32% of the 1003 adults said that national identity is strongly tied to birth…

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: 13 The dala In a study, 137 children of a certain race in a certain city were randomly assigned to…

A: Step 1: Calculate PercentagesWe need to calculate the proportion of children who graduated from high…

Q: Of 600 students sampled, 480 said they hoped to own a house someday. With 95% confidence, what is…

A: It is given that  Sample size, n = 600 Favourable cases, X = 4 Sample proportion, p^ = X/n  =…

Q: a. Identify the population of interest. Choose the correct answer below. O coffee shops O adults 500…

A: It is given that,A newspaper reported that  of people say that some coffee shops are…

Q: A poll was conducted to examine if people are happy with the government. 400 people were asked and…

A: It is an important part of statistics . It is widely used .

Q: A poll asked adults in a certain country whether immigration was a good thing or a bad thing for the…

A: Let, x denotes the adults who says immigration is good thing. Total respondents: n=1078 x=612

Q: A study of 420,078 cell phone users found that 132 of them developed cancer of the brain or nervous…

A: given that,possible chances (x)=132size(n)=420078success rate ( p )= x/n = 0.000314point of estimate…

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

A: A survey was conducted with 1900 people to check whether they thought sum went around the planet…

Q: Google is studying the quality of results returned by an upgraded version of its search engine.…

A: From the given information, it can be observed that x = 23 and n =100.

Q: 1. A Pew Poll conducted in 2013 surveyed a random sample of 200 adult Americans and 36 of them said…

A: Note- Since you have posted multiple questions, as per our guidelines we are supposed to answer only…

Q: A polling agency conducted a survey by selecting 100 random samples, each consisting of 1,200 United…

A: The objective of the question is to understand the correct interpretation of a 95% confidence level…

Q: Facebook would like to study the demographics of the individuals that utilize their platform. Their…

A: a. The sample size n= 455. Out of the 455 Facebook users 63 were teenagers. The sample proportion is…

Q: A poll asked whether states should be allowed to conduct random drug tests on elected officials. Of…

A:

Q: You plan to conduct a survey to find what proportion of the workforce has two or more jobs. You…

A:

Q: 9. A supermarket is planning to market a new ice cream. However, before marketing this ice cream,…

A: No. of people who tasted ice cream (n)=400 No. of people who liked the ice cream (x)=244

Q: Ten engineering schools in the United States were surveyed. The sample contained 250 electrical…

A: Given that  n1=250 , X1=80 , n2=175 , X2=40

Q: Are Republicans less likely than Democrats to display the American flag in front of their residence…

A: Consider that p1, p2 is the true proportions of Republicans and Democrats, who display the American…

Q: ublic Policy Polling recently conducted a survey asking adults across the U.S. about music…

A: We have given thatn=571, X=80, C.I=99%=0.99

Q: In a 2008​ survey, people were asked their opinions on astrology​ - whether it was very​ scientific,…

A: We have given that people were asked their opinions on astrology​ - whether it was very​ scientific,…

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

A:

Q: In a survey of 1036 adults, a poll asked, "Are you worried or not worried about having enough money…

A: From the provided information, Sample size (n) = 1036 649 stated that they were worried about having…

Q: poll asked adults in a certain country whether immigration was a good thing or a bad thing for the…

A: A poll asked adults in a certain country whether immigration was a good thing or a bad thing for the…

Q: A poll asked adults in a certain country whether immigration was a good thing or a bad thing for the…

A: Given information is A poll asked adults in a certain country whether immigration was a good thing…

Q: A recent Gallup Poll interviewed a random sample of 1523 adults. Of these, 868 bought a lottery…

A: Margin of error is used to measure the error occurred in the sample. It explains the percentage of…

Q: Find a 95% confidence interval for the proportion of the entire voter population who approve or…

A:

Q: In a past presidential​ election, 37,979,113 people voted for Candidate​ A 37,758,117 for Candidate​…

A: a. In the past presidential​ election, 37,979,113 people voted for Candidate​ A; 37,758,117 for…

Q: Do more than 50% of U.S. adults feel they get enough sleep? According to Gallup's December 2004…

A: Sample size =1003 Number of US adults surveyed said that get enough sleep =552  We have to find the…

Q: 59% of 81 delegates in a political convention favored changing the rules to restrict the number of…

A: n= 81P^ = 0.59CI = 0.95P(-z < P <z) = 0.95∴z= 1.96    (∵ z- table)

Q: political researcher takes a survey of 310 randomly selected registered voters in Orlando, and each…

A: Given that.  n=310 , Candidate A=110 , Candidate B=185 Unsure or plan to vote for another…

Q: In a study investigating the difference in food preferences between men and women, researchers asked…

A: In a study investigating the difference in food preferences between men and women, researchers asked…

Q: a. Which test will you use to test for this statistical analysis? b.State the null and alternative…

A: The proportion of men who used smartphones = 379/973 =0.3895 =p1 The proportion of women who used…

Q: On April 15th, 1912, the R.M.S. Titanic sank into the North Atlantic Ocean, resulting in the loss of…

A: Given, The proportion of survivors by each class here is computed as: p(crew) = 212 / 885 =…

Q: Construct and interpret a 95% confidence interval

A: According to a recent random survey of 3,728 US adults, 1,939 report using their cell phones to play…

Q: An advertising agency wants to estimate the response rate for a new flyer. The agency sent the flyer…

A: sample size(n)=100No. of people received orders(x)=12

Q: n a survey of 3422 adults aged 57 through 85​ years, it was found that 82.7​% of them used at least…

A:

Q: Social Networking Sites In a survey of 2255 randomly selected US adults (age 18 or older), 1787 of…

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Q: 6.5 Gender equality. The General Social Survey asked a random sample of 1,390 Americans the…

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Q: Construct a 95% confidence interval for p1 - p2 for a survey that finds 30% of 240 males and 41% of…

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.