hrm stats ch 6

persons B, C, and D

Suppose you select a sample of three people from a population of four (A, B, C, D). Which of the following samples is possible using the experimental sampling strategy?

Researcher B's, because the sample size was larger.

Two researchers select a sample for a population with a mean of 12.4 and a standard deviation of 9. Researcher A selects a sample of 30 participants. Researcher B selects a sample of 40 participants. Which sample is associated with a smaller standard error?

the same participant can never be selected twice in the same sample

Experimental research is typically conducted using a sampling strategy in which ______.

False

If a researcher selects a sample of 64 participants from a population with a variance of 16, then the standard error of the mean will be 2.0.

We expect that the population mean is equal to 23 because the sample mean is an unbiased estimator of the population mean.

A researcher randomly selects a sample of athletes and reports that their average score on a health and fitness scale is 23. Based on the characteristics of the sample mean, what does this say about the mean in the population?

mean = 12, standard error = 0.5

A researcher randomly selects a sample of participants from a population with a variance of 4. If a researcher selects a sample of 16 participants with a mean of 12, then what is the mean and standard error for the sampling distribution of the mean?

False

A researcher selects a sample of 169 participants from a population with a mean of 50 and a standard deviation of 13. The probability of selecting a sample mean that is less than 49 is .8413.

0.5

A researcher selects a sample of 64 participants from a population with a mean of 10 and a variance of 16. What is the standard error of the mean?

sampling with replacement

A researcher selects from a participant pool of four males and six females. He determines that the probability of selecting two male participants is p = .16. Based on this probability, what strategy did the researcher use to sample participants?

None, both samples will have the same value for standard error.

A researcher selects two samples of 25 participants each. In the first sample, the population mean was 32 and the variance was 8. In this second sample, the population mean was 4 and the variance was 8. Which sample will be associated with a larger standard error of the mean?

Sample 1

A researcher selects two samples of 64 participants each. In the first sample, the population mean was 10 and the variance was 16. In this second sample, the population mean was 25 and the variance was 9. Which sample will be associated with a larger standard error of the mean?

False

A researcher wants to select a sample of 30 participants from one of two populations. In Population A, the standard deviation is 12. In Population B, the standard deviation is 4. In this example, selecting a sample from Population A will produce the smallest standard error.

True

A sample mean is not always equal to a population mean.

True

As sample size increases, standard error decreases.

decreases

As sample size increases, the standard error of the mean ______.

False

Researchers typically sample with replacement, although the development of statistical theory was based on the use of sampling without replacement.

True

There are more possible samples that can be selected using theoretical sampling than using experimental sampling for any sample size greater than 1.

True

We can find the probability of obtaining a sample mean from a population using the standard normal distribution.

experimental sampling

Which type of sampling is most often applied by researchers in the behavioral sciences (including HR)?