Yadira M

An appliance repair shop owner has fitted the quadratic trend equation ŷ = 90 + 0.9x + 3x² to a time series of annual repair orders, with y= the number of repair orders and x= 1 for 2000. Forecast the number of repair orders for 2008; for 2010

For the multiple regression equation ŷ = 100 + 20x©û - 3x©ü + 120x©ý a. Identify the y-intercept and partial regression coefficient. b. If x©û = 12, x©ü = 5, and x©ý c. If x©ý were to increase by 4, what change would be necessary in x©ü in order for the e...

The quarterly seasonal indexes for a firm’s electricity consumption are 115, 92, 81, and 112 for quarters I-IV. It has been forecast that electricity consumption will be 850,000 kilowatt-hours during 2008. Forecast electricity consumption for each quarter...

A regression model has 2 independent variables and 16 observations, and the calculated Durbin-Watson d statistic is 2.78. What, if any, conclusion will be reached in testing for autocorrelation of the residuals with a: a. two-tail test at the 0.05 level o...

When autocorrelation of the residuals is present, what effect can this have on interval estimation and significance tests regarding the regression model involved?

A right-tailed area in the chi-square distribution equals 0.05. For 8 degrees of freedom the table value equals: A) 11.07 B) 15.507 C) 13.362 D) 17.535 E) 16.182