Statistics And chologist is consulting with Famly pra An industhayorganiz ts bes
ID: 3045788 • Letter: S
Question
Statistics And chologist is consulting with Famly pra An industhayorganiz ts best doctors to a rival pediatric practice. The management at Family Practice would like to know what it can do to increase job satisfaction for its remaining pediatricians. The psychologist is trying to determine whether significant information will be lost if she surveys a subset rather than every single pediatrician at Family Practice. The following table lists the job satisfaction scores for all eight pediatricians at Family Practice as well as four examples of possible four-pediatrician samples. At the bottom of the table, the variance listed in the second column for all eight pediatricians is the population variance for the eight pediatricians (that is, o2 = ss/: sse). The variances listed in the third through the sixth columns are the sample variances for each of the four-pediatrician samples (that is, sa- SS/ (n -1) -SS/3). Pediatrician Satisfaction Sample 1 Sample 2 Sample 3 Sample 4 Mean 6.00 5.755.25 5.00 5.25 Variance 5.50 4.92 6.25 8.7 2.92 What is the mean of the four sample means? What is the mean of the four sample variances? f the average value of the sample statistic, obtained over all possible samples, is A sample statistic is equal to the population parameter A sample statistic is if it consistently underestimates or overestimates the corresponding population A sample mean (that is, M-x/n) is estimate of the population mean A sample variance that is computed as s2-SS / n- 1) is estimate of the population varianceExplanation / Answer
->mean of the sample means= (5.75+5.25+5.00+5.25)/4
=5.3125
->mean of sample variances= (4.92+6.25+8.67+2.92)/4
=5.69
->perfect
->not a fit
->rough estimate
->approximate