Non-profits Do people who work for non-profit organi-zations differ from those who work at for-profit compa-nies when it comes to personal job satisfaction? Separate random samples were collected by a polling agency to investigate the difference. Data collected from 422 em-ployees at non-profit organizations revealed that 377 of them were “highly satisfied.” From the for-profit compa-nies, 431 out 518 employees reported the same level of satisfaction. Find the standard error of the difference insample proportions.

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: An executive at the home office of Big Rock Life Insurance is considering three branch managers as…

A: Part (a): Level of significance is 0.01. Hypotheses: Null hypothesis: That is, there is no…

Q: Suppose I was interested in a snapshot of the number of persons leaving a grocery store today to…

A: 1) Suppose I was interested in a snapshot of the number of persons leaving a grocery store today to…

Q: A 2016 Pew Research poll found that 18% of cell phone owners use their phone for conducting…

A: It is given that the total number of cell phone uses are 18%, thus the population proportion is…

Q: A survey asked 827 randomly sampled registered voters in California to select a response best…

A: For the above analysis: Null hypothesis: There is no difference in support of drilling b/w those who…

Q: The Tokyo Marine Consultant wants to conduct a survey with the aim is to estimate banking and…

A:

Q: 1.What would happen to the confidence intervals if you changed the level of confidence? 2.What…

A: The general formula for calculating width of the confidence interval for the population proportuon…

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: Find the test statistic for this hypothesis test. z= (Round to two decimal places as needed.)

A:

Q: A company executive claims that employees in his industry get 100 junk emails per day. To further…

A: Given Information: Consider the given dataset: 125, 101, 109, 94, 122, 92, 119, 90, 118, 122. The…

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

A: Note: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts…

Q: Your friend Micah helped you with the null and alternative hypotheses... Ho : The proportions are…

A: The Chi-square goodness of fit test is a statistical hypothesis test used to determine whether a…

Q: A random poll asked the following question: “The proposed casino will produce a number of jobs and…

A: The given situation is a case of sampling bias. Because the question does not contain the negative…

Q: The Pew Research Center conducted a study of gender bias. The report "Men or Women: Who is the…

A: (a) The two treatments in this experiment are:The treatment of reading a profile of Ann Clark (first…

Q: Based on a sample of approximately 600 nonsmokers and 200 smokers, estimate the true difference…

A:

Q: Health insurance benefits vary by the size of the company (the Henry J. Kaiser Family Foundation…

A: a:For the given data, the chi-square test for association is appropriate.Null Hypothesis:H0: The…

Q: Last year, the marist poll conducted a national survey of adults and found that 35% responded "A lot…

A: Null and Alternate Hypothesis: H0: Response to this question by adults nationwide has not changed…

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: The Institute of Education Sciences measures the high school dropout rate as the percentage of…

A: In 2009, high school dropout rate between 16-24 years olds was 8.1% . A pooling company took a…

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: A survey asked 827 randomly sampled registered voters in California to select a response best…

A: The data for responses of the graduated college and didn't graduate college respondents is given.…

Q: A random poll asked the following question: “The proposed casino will produce a number of jobs and…

A: Given information: In a random poll it is asked that: “The proposed casino will produce a number of…

Q: An executive at the home office of Big Rock Life Insurance is considering three branch managers as…

A: According to the provided data, three branches managed by Adams, McDale and Vasquez are considered…

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: This question refers to a survey of a university's faculty members on affirmative action policies…

A: The conservative margin error is calculated based on the sample size. It is defined in percentage as…

Q: Social networking is becoming more and more popular around the world. Pew Research Center used a…

A: Introduction: Denote p1, p2, p3, and p4 as the true proportions of adults using social networking…

Q: After reading an article using research done by the Organization for Economic Co-operation and…

A: The 95% confidence interval for p is (0.25, 0.32).

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: A research group conducted an extensive survey of 3165 wage and salaried workers on issues ranging…

A:

Q: Quinnipiac University Poll is a leading polling organization. In May 2019, it released a survey…

A: For Republicans,   Proportion of positive results = P = x/N = 0.68 sample size =N=213Standard error…

Q: Researchers wish to test whether marijuana use among full-time college students aged 19-22 at a…

A: 1) The appropriate Null and Alternative Hypotheses are given below: From the given information, the…

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: What decisions can be made on the basis of The Harris Poll survey that measures the reputations of…

A:

Q: In June 2012 the Gallup organization conducted a pollusing a random sample of 1004 adults, aged 18…

A: From the given information, we have confidence Interval is 95%  Sampling error is 4 percentage…

Q: Bloomberg Research Corporation conducted a random survey on tax preparation methods. Data was…

A: The question is about sampling distribution.Given :No. of adults in a survey ( n )  = 17400No. of…

Q: In a survey conducted by a website, employers were asked if they had ever sent an employee home…

A: Given,   The sample proportion is,

Q: Do people who work for non-profit organizations differ from those who work at for-profit companies…

A: Let    be the number of delighted employees at "non-profit" and "for-profit" organizations. For…

Q: A dentist wants to a conduct a survey via telephone to determine what percent of all adults in their…

A: It is needed to find the example of response bias.

Q: In 2014, Scotland was considering independence from England, going so far as to take a referendum…

A:

Q: The Tokyo Marine Consultant wants to conduct a survey with the aim is to estimate banking and…

A: a)Let banking be the sample 1 and hospital be the sample 2. Then, for sample…

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.