How is a cluster sample done? - This question is based on Research Methodology  A. By sampling only from known clusters and not randomly in the population. B. By sampling clusters first and then individuals in that cluster. C. By using clusters to ensure that there is an increased representativeness. D. All options are correct.

Q: For a study that consists of personal interviews with participants​ (rather than mail or phone​…

A:

Q: Fill in the missing data. (Round your p-value to 4 decimal places, mean values to 1 decimal place,…

A: let we make the table for given dataDays Worked Last Year by 23 employees Department days worked…

Q: A team of researchers (Singer et al., 2000) used the Survey of Consumer Attitudes to investigate…

A: Solution

Q: You are interested in people’s opinion about an upcoming local political election. You poll people…

A: In the given scenario, the number of counts for indicating the vote for Candidate A or Candidate B…

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: By using the standard normal table, the critical value zα2 at the 99% confidence level is, 2.576.…

Q: Two sets of sample data, A and B, are given. Without doing any calculations, indicate in which set…

A: INTRODUCTION :  BOX PLOT TECHNIQUE   In the Box plot technique, the Five number summary is used…

Q: With double-digit annual percentage increases in the cost of health insurance, more and more workers…

A: Given that, Sample data are reported for 50 employees of small companies, 75 emplyees of medium…

Q: n this population data : (1, 2, 3, 4) what is the Standard Error when a sample size of 3 is drawn.

A: Here use standard error formula with finite population

Q: Modern Managed Hospitals (MMH) is a national for-profit chain of hospitals. Management wants to…

A: Part a: The patients are divided into different groups (strata) and then a simple random sample is…

Q: What is the most important thing to remember when choosing a sample? a. Samples should be chosen at…

A: We have given that the statement about to the sample. It is a part of population.

Q: If we need a sample size of 15 from the table below, how many samples we need to get in Group A…

A: Answer: Option d. 8

Q: Which of the following techniques yields a simple random sample? A. Choosing volunteers from an…

A: Simple random sampling is a probability sampling in which we randomly select a subset of…

Q: Explain the Representative Sample from a Population in Which the Variables Are Related?

A: The population is the area of interest for which, one want to inquire the characteristics or trend.…

Q: If the sample size is n=16 what is likely true about the shape of the population?

A: Solution:  Central limit theorem: The central limit theorem state that as the sample size increases…

Q: With systematic sampling, the sample may be biased if:   Select one: A. there is a systematic…

A: Option A there is a systematic pattern in the data.  If the population placed on the list is…

Q: The XYZ Corporation is interested in possible differences in days worked by salaried employees in…

A: applying one way ANOVA on above data:   Mean n Std. Dev Variances budgets 257.4 5 11.7388…

Q: You are conducting a statistical survey of library users. There are approximately 2500 people in the…

A: Total size of the population = 2500 peopleNumber of people to be selected for survey = 25 people

Q: The XYZ Corporation is interested in possible differences in days worked by salaried employees in…

A: The question is about ANOVAGiven :To find :Are the mean annual attendance rates the same for…

Q: ample size always be 4, 5 or 6 -no smaller nd no larger? nswers to Conceptual Questions

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

Q: Adults aged 18 years old and older were randomly selected for a survey on obesity. Adults are…

A: From the given information,   The number who are obese Sample size Men 2766 155525 Women…

Q: The first student enrolled in one Statistics class was selected randomly and then every 8th student…

A: Here in the above question 1 , the number of times per week is quantitative-discrete. 2- in this…

Q: TV stations use ratings to decide which shows to keep or cancel. Therefore, the A. C. Nielsen…

A:

Q: You are the operations manager for an airline and you are considering a higher fare level for…

A: Given information- Margin of error, E = 4.5% = 0.045 Confidence level, c = 95% Since nothing is…

Q: A power analysis is a calculation used to estimate the smallest sample size needed for an…

A: 1)It is impossible to overstate the value of power analysis in an experiment. It is a vital tool for…

Q: Income Tax and the IRS. In 2010, the Internal Revenue Service (IRS) sampled 308,946 tax returns to…

A: a)Sampling error:When a sample is used to estimate a population characteristic the error resulting…

Q: I1. A field of study contains 14,204 men and 17,811 women. A survey stratified with respect to…

A: Given Information: Number of men  = 14204 Number of women = 17811 The sample size (n) = 750…

Q: The accuracy of a census report on a city in southern California was questioned by some government…

A: The test hypotheses are given below: H0: The census distribution and the sample distribution are…

Q: In preparing a report on the economy, we need to estimate the percentage of businesses that plan to…

A: Given that, In preparing a report on the economy, we need to estimate  the percentage of businesses…

Q: Which of the following sampling method would be least likely to produce accurate and representative…

A: Let CS denote Cluster Sampling. Let SRS denote Simple Random Sampling. Let SyS denote Systematic…

Q: 1. A scientist is studying the effect of exercise on blood pressure. He studies 50 people who…

A: In this case, the scientist studies 50 people to determine the effect of exercise on their blood…

Q: A graphical device used for enumerating sample points in a multiple-step experiment is a _____. a.…

A: Solution: Tree diagram is a graphical device that explains the different stages of an experiment.…

Q: Give a practical conclusion for the test in the words of the problem. Use a = 0.10 to make your…

A: Test is that whether the average size of diamonds reported by three certification groups differ.…

Q: 10. Which of the following scenario is LEAST likely to produce a sampling error?

A:

Q: In 1945, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you…

A: GivenA hypothesis is conducted to compare two proportionsThe Test statistic is 3.60The p value is…

Q: a) Work this problem manually (by hand) using the procedures and formulas for ANOVA to check if the…

A: Given observation Airbus Boeing737 Boeing787 6.4 8.7 9.9 7.8 7.4 12.8…

Q: Give two reasons why it would be necessary to examine a sample of the shirts produced rather than…

A: Give two reasons why it would be necessary to examine a sample of the shirts produced rather than…

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.