An industrial/organizational psychologist is consulting with Family Practice, wh
ID: 3238798 • Letter: A
Question
An industrial/organizational psychologist is consulting with Family Practice, which has just lost several its best doctors to a rival practice. The management at Family Practice would like to know what it can do to increase job satisfaction for its remaining The psychologist is trying to determine whether significant information will be lost if he surveys a subset rather than every single at Family Practice. The following table lists the job satisfaction scores for all eight at Family Practice as well as four examples of possible four- samples. At the bottom of the table, the variance listed in the second column for all eight is the population variance for the eight (that is, sigma^2 = SS/N SS/g). The variances listed in the third through the sixth columns are the sample variances for each of the four- samples (that is, s^2 = SS/(n - 1) = SS/3). What is the mean of the four sample means? What is the mean of the four sample variances? A sample statistic is if the average value of the sample statistic, obtained over all possible samples, is equal to the population parameter. A sample statistic is if it underestimates or overestimates the parameter. A sample mean (that is, ) is estimator of the mean. A sample variance that is computed is estimator of the population variance.Explanation / Answer
Mean of the four sample means is 6.125
Mean of the four sample variances is 3.71
A sample statistic is unbiased if theaverage value of the sample statistic obtained over all possible samples equal to the population parameter.
A sample statistic is biased if the average value of the sample statistic obtained over all possible samples is not equal to the population. Parameter.