A survey of 2321 adults in a certain large country aged 18 and older conducted by a reputable polling organization found that 403have donated blood in the past two years.  (a) Obtain a point estimate for the population proportion of adults in the country aged 18 and older who have donated blood in the past two years. ​

Q: What is the method of the sampling when the marketing manager for an electronics chain store wants…

A: stratified sampling Stratified sampling :- When we have Homogenous distinguishable sub-groups. Then…

Q: A popular Italian eatery has had a dispute among the wait staff regarding the amount of tips waiters…

A: Lunch:Sample size Sample mean Sample standard deviation Dinner:Sample size Sample mean Sample…

Q: A company claims that 76% of its employees are satisfied with the work conditions. An independent…

A: Formula of test statistic : z = p^ - pp(1-p)n Where , p^ is sample proportion. p is hypothesized…

Q: A Pew Research study estimates that 803 million people live in poverty today, after the 2020 global…

A: It is given that 803,000,000 people live in poverty today, out of 7,754,000,000 people worldwide.

Q: What sampling method was used?

A: 100 students was required to estimate the mean achievement in research of graduatestudents. The…

Q: Refer to a study of the factors that lead to successful performance-based logistics projects. Recall…

A: Given information: The data for the experience for the 5 commercial suppliers is given.

Q: Suppose Diana, an educational researcher at a local university, wants to test the impact of a new…

A: Diana selects a simple random sample of 68 freshmen and divides them into 34 pairs. we have given,…

Q: In a study of teen cell phone use, 117 high school students were observed as they drove out of their…

A: Solution Given out of 117 students drive their vehicles to school and 46 were taking on their…

Q: A 2015 Gallup poll of 1,627 adults found that only 22% felt fully engaged with their mortgage…

A: Here the sample size is number of adults.

Q: Suppose a cable network wants to determine the current percentage of customers who are under the age…

A: GivenMargin of error(E)=3%=0.03confidence level=90%

Q: Suppose a random sample of n=270 teenagers 13 to 17 years of age was asked if they use social media.…

A: It is given that 270 teenagers 13 to 17 years of age was asked if they use social media in which 204…

Q: A survey of 2310 adults in a certain large country aged 18 and older conducted by a reputable…

A: Given information- We have given that in a survey of 2310 adults in a certain large country aged 18…

Q: It is believed that 11% of all Americans are left-handed. A college needs to know how many…

A: Solution: Given information: n = 210 Sample size  p= 0.11 Population proportion

Q: A study was conducted to examine the percentage of senior citizens in town X who are still working…

A: A study was conducted to examine the percentage of senior citizens in town X who are still working…

Q: Ten countries were randomly selected from the list of 129 countries in the Country. The countries…

A: Given Information :  Ten countries were randomly selected from the list of 129 countries in the…

Q: Archeologists excavating at a Viking site in Newfoundland have determined that the age of the…

A: Mean 95% of the artifacts are between 900 and 1100 years old.

Q: Number of drivers involved with accidents 600 during night time. Number of drivers involved with…

A:

Q: A world-wide study conducted last year found that adult gamers (people who play a video game at…

A: Statistical hypothesis testing is an important method in inferential statistics. It is used to test…

Q: According to a Gallup poll conducted in September 2016, “64.2% of U.S. adults report that they ate…

A: Solution-: Given: p^=0.642(or64.2%), n=2,415,499 adults,  E=0.08 We find the 95% C.I. and What is…

Q: Construct a confidence interval to estimate the proportion of U.S. adults who ate healthy…

A: HERE AS PER guidelines  I HAVE CALCULATED 3 SUBPARTS PLZ REPOST FOR REMAININING    According to a…

Q: 1)The records for all trains scheduled to depart from the opera house train station last year showed…

A: In given questionConcept Used: Population: Population is a characteristic of the specified area or…

Q: According to the Pew Research Center,on the propotion of the American population who use only a…

A: A)Verifying the conditions:It is given that, the proportion of the American population who use only…

Q: 1) In a four-year psychedelic-mushroom experiment, 93 of the 300 subjects reported experiencing…

A:

Q: A balance used in an entomology lab to weigh grasshoppers is quite old and has been used for…

A:

Q: (c) Construct and interpret a 90% confidence interval for the population proportion of adults in the…

A: Given that  Sample size n =2304 Favorable cases x =404 Sample proportion p^=x/n  =404/2304 =0.1753

Q: Use these results from a USA Today survey in which 510 people choseto respond to this question that…

A:

Q: According to the Pew Research Center,on the propotion of the American population who use only a…

A: Solution:Part(D):Finding the test statistic value for the hypothesis test for…

Q: According to study conducted in Turkey in 2018, data collected by observers at randomly selected…

A:

Q: Thirty-three percent of all Americans drink bottled water more than once a week (Natural resources…

A: Note: Hi there! Thank you for posting the question. Unfortunately in the sub-part(b), some required…

Q: A survey of 400 non-fatal accidents showed that 189 involved the use of a cell phone. Determine a…

A: Given that, In a survey of 400 non-fatal accidents showed that 189 involved the use of a cell phone.

Q: The IRS is interested in estimating the total number of tax accounts who has their own tax returns…

A: A random sample of 100 returns showed that 15 were audited; n=100 x=15 α=0.95

Q: In how many ways can a statistician select a sample of 15 people from a population of 90 people?

A: Given,A statistician select a sample of 15 people from a population of 90 people.

Q: The National Technology Readiness Survey sponsored by the Smith School of Business at the University…

A: Denote p2009 and p2004 as the true population proportions of spam emails deleted by Americans in…

Q: The manufacturer of a sports car claims that the fuel injection system lasts at least 48 months…

A: Let X represents the ages of sports cars at the time of replacement. x 29 42 49 48 53…

Q: In the Star and Tribune newspaper, there is an article entitled “1 in 8 school buses fail tests."…

A: Given information: Sample of 200 buses and find that 20 buses fail the safety inspection. Let us…

Q: sample of n = 80 C of I students found 16 with brown eyes. Give the numerical value of the statistic…

A: Sample size n=80Favorable cases=16

Q: ged? In on, 18% 2012, a school chelor's ached?

A: See hand written solution ,

Q: Suppose one of these persons is selected at random, compute P(C₂ or 1₂). Select one: O a. 0.571 O b.…

A: Given that   C2 = 665 , I2 = 334 C2 and I2 = 166

Q: Set up a calculation used to determine how many possible samples of 8,315 respondents are possible…

A: For a population size of N, the total no. of samples that can be obtained with a sample size of n…

Q: From the U.S. Census Bureau's American Community Survey in 2019 it was found that 33.13% of United…

A: Note: Hi there! Thank you for posting the question. As you have posted multiple questions, as per…

Q: If 471 households were surveyed out of which 385 households have internet fiber cable, what is the…

A: Among 471 households 385 households have internet fiber cable, therefore 471-385 = 86 households…

Q: In 2014, about 11.3% of U.S. workers belonged to a union. Suppose a sample 400 of U.S. workers is…

A: Given,sample size(n)=400

Q: If we construct a 95% confidence interval estimate for the true proportion of all Minnesota school…

A: here given, n = 200 sample proportion  =20200 = 0.1 here for z-critical use excel command…

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.