In a survey of 70 business firms, it was found that 45 were planning to expand their capacities next year. Does this sample information contradict the hypothesis that 70% of the firms in general are planning to expand next year?

Q: poll in June 2020 found that 81% of American parents believe that virtual learning instead of…

A: Given data number of success , x= 822.0 sample size, n = 1081 population…

Q: According to a Harvard Health Publishing article, the normal body temperature may be  lower than…

A:

Q: At a certain college, it is estimated that at most 35% of the students ride bicycles to class. At…

A: given  let p = 0.35 represent the proportion of students who ride bicycles to class  let x = 28…

Q: In a survey of 10,000 IV drug abusers in town A, 1,000 turn out to be infected with hepatitis C and…

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Q: According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft,…

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Q: Using the following data from 5 states, we are asked to investigate the hypothesis that the number…

A: Given Information : Using the provided data from 5 states, we are asked to investigate the…

Q: According to a Gallup survey two years ago, 32% of American households use a computer or online…

A: From the provided information, Sample size (n) = 85 Sample proportion (p̂) = 0.36 Level of…

Q: In a survey of 52 students in the cafeteria, it was found that 15 were commuters. If one-quarter of…

A: Let there were x females and y males. So, x+y=52   Given that one-quarter of the female students and…

Q: I need help with #1 parts A through D

A: a. Denote p1, p2, and p3 as the respective relative frequencies or proportions of people who replied…

Q: 2. A study found that 60 percent of college students say they are housing insecure, while 18 percent…

A: Given

Q: A consulting firm that surveyed consumers' holiday shopping behavior found that the percentage of…

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Q: According to the IRS, individuals filing federal income tax returns prior to March 31 received an…

A: The significance of the mean is calculated if the population standard deviation is unknown and the…

Q: randomly selected sample of 400 students at a university with 15-week semesters was asked whether…

A: Given that  Sample size n =400 Sample proportion p^=46%=0.46

Q: After examining these data for all the jurisdictions, someone notes that certain areas have an…

A: Statistically speaking an outlier is removed only when the data values are impossible or incorrect .…

Q: (c) A company studied the number of lost-time accidents occurring at its Nairobi Industrial Area,…

A: Let, P(last year)=6%=0.06, P(current year)=5%=0.05,  P(current year | last year)=15%=0.15.

Q: At a certain college, it is estimated that at most 35% of the students ride bicycles to class. At…

A: Given that the proportion of students that ride bicycles to class = 35% or p =0.35 Let x= 28…

Q: IN A CITY 250 MEN OUT OF 750 WERE FOUND TO BE SMOKERS. DOES THIS INFORMATION SUPPORT THE CONCLUSION…

A:

Q: In a survey of 1000 adult Americans, 46.7% indicated that they were somewhat interested or very…

A: From the provided information, Sample size (n) = 1000 Sample proportion (p̂) = 0.467 The hypotheses…

Q: Suppose a company surveyed the work preferences and attitudes of 1,006 working adults spread over…

A: The question is about Chi-Square test for Independence. There are 2 variables. Those are Leaving job…

Q: A Harris Interactive poll reported that 32.4% of 275 randomly selected Americans living in the west…

A: Denote p1, p2 as the true population proportions of Americans living in the west and south,…

Q: A student researcher was surprised to learn that the 2017 NCAA Student-Athlete Substance Use Survey…

A: Since the question to be answered is not specified, we'll be answering only the first question.…

Q: According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft,…

A: If the value of sample size is more than 30, then we say that it is a large sample test. Once we…

Q: A group of students conducted a study to determine whether women will have higher levels of low…

A: Null Hypothesis: A hypothesis which is tested for plausible rejection is called the Null Hypothesis…

Q: The Vegetarian Resource Group commissioned Harris Poll in 2016 to conduct a nationally…

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Q: A random sample of voters found that 180 out of 320 people were in favor of a gas tax. Election…

A: Given Random sample is 180 out of 320 voters are in support of tax. Total 36000 people voted in…

Q: According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft,…

A: Solution: Let X be number of complaints of identity theft and n be the sample number of customer…

Q: In a recent Super Bowl, a TV network predicted that 71 % of the audience would express an interest…

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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 predicted outcome of the 2020 US election was 5/9 in favour of Joe Biden. What is the average…

A: Here we want to Know average information content of this process.

Q: If a study determines the difference in average salary for subpopulations of people with blue eyes…

A: From the provided information, The study determines the difference in average salary for sub…

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

A: Given that n = 30 x = 16 α=0.10Given claim : proportion greater than 0.37The claim is either the…

Q: The average monthly income of recent business major graduates was reported to be $2,800. It is…

A: From the provided information, Average monthly income (µ) = $2,800 The claim is that a recession has…

Q: In a previous poll, 35% of adults with children under the age of 18 reported that their family ate…

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Q: Assuming the market research was done properly and the 40% is representative, how many sales are…

A: Expected numbers = E[x]

Q: A sociologist sampled 200 people who work in computer-related jobs, and found that 42 of them have…

A:

Q: A poll in June 2020 found that 83% of American parents believe that virtual learning instead of in-…

A: Note: Since you have posted a question with multiple subparts, we will solve the first three…

Q: A recent PwC survey of 1,379 CEOs from a wide range of industries representing a mix of company…

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Q: According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft,…

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Q: Although a research study is typically conducted with a relatively small group of participants most…

A: In statistics, population is a large group of individuals from which a small group of individual…

Q: A company studied the number of lost-time accidents occurring at its Brownsville, Texas, plant.…

A: Let A denote event that employee suffers lost-time accidents during the last year. Let B denote…

Q: According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft,…

A: Population proportion , p = 0.23 Sample size , n = 1680 Favorable courses , x = 436 Level of…

Q: At any age, about 20% of American adults participate in physical conditioning activities at least…

A:

Q: n a survey of 1000 adult Americans, 45.7% indicated that they were somewhat interested or very…

A: Solution: Given information: n= 1000  Sample size  p^= 0.457  Sample proportion p= 0.50 Population…

Q: In a current study, a random sample of 20 teachers from Georgia and an independent random sample of…

A: Given data:   Georgia Indiana   29227 33567   35464 41744   45458 51186   32113 30464…

Q: A company studied the number of lost-time accidents occurring at its brownsville,Texas, plant.…

A: The given information is that the records show that 6% of the employees suffer lost-time accidents…

Q: During the Covid crisis, there were lockdowns and working-from-home, which made collecting data on…

A: The sample and population follows the normal distribution and the sample size is small, then t test…

Q: Based on these tables, would you accept or reject the hypothesis that individuals in bad…

A: From the given output table it is clear that there are two groups good neighborhood and bad…

Q: According to the February 2008 Federal Trade Commission report on consumer fraud and identity theft,…

A: