Exam 7: The Logic of Sampling

After taking a random start between 1 and 20 and then taking every 20th element from the sampling frame,Smith learned that 40% of the sample believed the company's president was doing a good job.The calculated standard error was 3 percent.Assuming a normal distribution,this means that

The age distribution of all citizens within a sample from a city is an example of a

In her research project,Ella wants to study the processes involved in lesbian partners adopting children.She starts off by interviewing lesbian couples who have adopted in the past,and they in turn,give her names of other lesbian couples who have adopted.The process by which Ella gets her sample is called

Sampling error is typically reduced by either increasing sample size or by increasing the homogeneity of the elements being sampled.

Telephone directories are notorious for being inadequate sampling frames.Suppose the population was defined as "all telephone subscribers in the directory's service area." What criticisms could you make of the telephone directory as a sampling frame?

The general guideline for the cluster design is to minimize the number of clusters selected while increasing the number of elements within each cluster.

Which of the following statements about informants is FALSE?

Clara is interested in studying the relationship between amount of time spent exercising and training,and athletic performance.She chooses to study the university's men's basketball team.She hypothesizes that the greater the amount of time spent in training per day,the better the athlete's performance.In this case,the individual team member is the element.

A sampling interval of 5 was used to select a sample from a population of 1000.The researcher should start sampling with

Which of the following statements is FALSE?

Maggie wanted to do a study of women who had participated in extramarital affairs.Since there is no sampling frame listing all such women,she visited a women's group and asked for volunteers among those who had participated in an affair.She then asked each of those women for the names of other possible study participants.She was using which design?

Unlisted telephone numbers creates a special problem for accurate

Taken as a whole,a stratified sample is more likely to be representative on several variables than a single random sample.

You,as a researcher,are interested in studying the long-term effects of incarceration on death-row inmates.Ideally,you would like to have a total sample of at least 1,000 inmates from maximum-security prisons all over the United States.Describe how you would go about obtaining a representative sample.Be sure to identify the: a)element; b)population; c)survey population; d)sampling method; and e)sampling frame(s).

Mildred wanted to do a study of recycling club members employing a random sample.There is no master list of recycling club members in the U.S.She has only enough money to study 70 clubs.What would be the best design to use?

What is the basic process in probability proportionate to size sampling?

John is looking to randomly select 100 students in his college to take part in a graduate research study on underage drinking.He has a list of all students that is numbered.To select participants,he uses a random number table to choose them.What form of sampling is John using?

To accumulate a sample of 500 telephone numbers,I decide to include every 20ᵗʰ telephone number in the local telephone directory beginning randomly with the letter "N." I have engaged in

In a sample stratified by gender,the sampling error on this variable is reduced to zero.

If I would like the results of my research on attitudes regarding premarital sex to be as close to the population's attitudes as possible,I would have the most accurate results with a sample of ____________ people.