There are 4327 colleges in a certain country and the number full-time students is 13, 287,563. (a) Are the numbers of full-time students at different colleges discrete or continuous? Explain your answer.  (b) What do you think is wrong with surveying college student by mailing questionnaires to 10,000 who are randomly selected?  (c) If we randomly select four colleges and survey all their full-time students, what type of sample is obtained? (random, systematic, convenience, stratified, cluster)

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

A: It is given that margin of error (E) is 0.045 and the confidence level is 0.99.

Q: a stratified random sample? WO ber the students from 1 to 2000 and us ey the first 100 students to…

A: Stratified sampling is a process of random sampling. It is used to divide a population into…

Q: You want to interview 200 students in your school to determine their opinion on the new school…

A:

Q: medical information​ online?" Of 1072 Internet users who chose to​ respond, 38% of them responded…

A: The term used to describe this type of survey is C. The respondents are a voluntary response…

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: The city of Raleigh has 10000 registered voters. There are two candidates for city council in an…

A: Given x=185 n=10000

Q: entering your work cafeteria and are approached by an individual to participate in their study by…

A: Given that  You are entering your work cafeteria and are approached by an individual to participate…

Q: Nationally, 83% of Americans have earned a high school diploma.  We want to see if the proportion of…

A: We have to find sample proportion.

Q: 4. You are researching the average height of students in your class. You have the students line up…

A: You are researching the average height of students in your class. You have the students line up in…

Q: How is a sample related to a​ population?

A: Population is set of all elements about which we want to know. While the sample is a part of such…

Q: What do you think is the reason, why researchers prefer to get a sample from the total population…

A: A researcher can carefully design the study which to a large extent try to prevent the biases and…

Q: In a survey conducted by a reputable marketing agency, 248 of 1000 adults 19 years of age or older…

A: Given that ; Sample size (n) = 1000 adults No. Of adults using their cell phones in every bathroom…

Q: What do you mean by Random Sample?

A:

Q: Imagine a researcher asks a sample of five people to drive two types of cars and rate each of them…

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: Can someone please explain to me how to get the answers to the following questions...Use the sample…

A: 2a) From the data set the maximum value is 16.9, and minimum value is 2.1. The range is,…

Q: Here is a sample data set. You may use StatCrunch or Excel to help you sort the data in order! 293…

A:

Q: Statistics Question

A: Question #5: 16. 1. Let μ1 is defined as the population mean of the lower class participants, and μ2…

Q: In an Adecco staffing survey of 1000, adults in the US, 140 said the salary was the most important…

A: From the provided information, The sample size is 1000 which is sufficiently large and out of which…

Q: n IQ test is designed so that the mean is 100 and the standard deviation is 16 for the population of…

A: Given: μ=100, σ=16 and SE=8.   The formula of standard error is SE=zσn

Q: You are doing research on students and you are interested in looking at the differences among…

A: Given that, The collected 100 response from each class. i.e. 100 freshmen, 100 sophomores, 100…

Q: A political campaign wants to estimate the number of adult residents who voted in the last city…

A: Detailed explanation:(a)  We must take into account which survey sample is the most representative…

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: Harley Davidson motorcycles make up 13% of all the motorcycles registered in the United States.You…

A: Approximate distribution is normal

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: you want to know how how arizonia workers age 16 or older travel to work. To estimate the percentage…

A: Individual:Collected data which can be associated with a single element in a sample is called…

Q: We'd like to know the percentage of people living in California who owns a cell phone. How many…

A: It is given that margin of error (E) is 0.04 and the confidence level is 0.95.

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: our population? W

A: A population is a total group included in the survey. A sample is a specific group from which data…

Q: 1950, an organization surveyed 1100 adults and asked, "Are you a total abstainer from, or do you on…

A: In 1950, Total adults n1=1100                       x1=374 In recent year…

Q: re residents (if any) must I ask, given the fact that (somehow) I know that 62 percent of all…

A: Given: Sample size, n = 32 Probability, p = 62100=0.62 Here the distribution is binomial and for a…

Q: Why a casual or haphazard sample doesn’t qualify as a random sample?

A: Haphazard or casual sampling is where we try to create a random sample by haphazardly or casually…

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

A: a) From the given information, Margin error = 0.055 Assume sample proportion = 0.5   Critical value:…

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.