Week 4 Assignment
BUS 308
August 29, 2011
Week 4 Assignment
Chapter 9:
9.8 In an article in the journal of management, Wright and Bonett study the relationship between voluntary organizational turnover and such factors as work performance, work satisfaction, and company organizational turnover and such factors as work performance , work satisfaction, and company tenure. As part of the study , the authors compare work performance ratings for “stayers” (employees who stay in their organization) and “leavers” (employees who voluntary quit their jobs). Suppose that a random sample of 175 stayers has a mean performance rating (on a 20-point scale)
|Hypothesis Test: Independent Groups (z-test) | | | | | |
| | | | | | |
| | | | | | | | | | | | | |-3.1160 |confidence interval 99.% lower | | | | | | | | |-0.6840 |confidence interval 99.% upper | | | | | | | | |1.2160 | margin of error {part A} | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |9.50 suppose two independent random sample of sizes n1 =9 and n 2/2 =7 that have been taken from two normally distributed population having variances give examples variances of
Chapter 12
12.10 When using the multiple regression models, how do we obtain a point estimate of the mean value of the dependent variable and a point prediction of an individual value of the dependent variable?
The linear regression model relating y to x1, x2,…, xk is y = β0 + β1x1 + β2x2 +…+ βkxk + (
µy = β0 + β1x1 + β2x2 +…+ βkxk is the mean value of the dependent variable y when the values of the independent variables are x1, x2,…, xk
β0, β1, β2,… βk are unknown the regression parameters relating the mean...