* Tutorial 4.
* Multiple Linear Regression.

* Francis 5-1-1 - Standard Regression - Worked Example (pp 115-120).

* DV = engach (English Achievement).
* IV1 = sel (Socio-economic Level).
* IV2 = sex (Student gender).
* IV3 = enghomewk (Freq of English homework).
* IV4 = attent (Attentiveness in Year 8).

REGRESSION
  /DESCRIPTIVES MEAN STDDEV CORR SIG N
  /MISSING LISTWISE
  /STATISTICS COEFF OUTS CI R ANOVA ZPP
  /CRITERIA=PIN(.05) POUT(.10)
  /NOORIGIN
  /DEPENDENT engach
  /METHOD=ENTER sel sex enghomwk attent  .


* Francis 5-1 - Standard Regression - Exercise (pp 120, 256).

* DV = mathsach (Maths Achievement).
* IV1 = matusefl (Children's Perception of Maths Usefulness).
* IV2 = matenjoy (Enjoyment of Maths).
* IV4 = attent (Attentiveness in Year 8).
* IV4 = sex (Student Gender).

REGRESSION
  /DESCRIPTIVES MEAN STDDEV CORR SIG N
  /MISSING LISTWISE
  /STATISTICS COEFF OUTS CI R ANOVA ZPP
  /CRITERIA=PIN(.05) POUT(.10)
  /NOORIGIN
  /DEPENDENT mathsach
  /METHOD=ENTER matusefl matenjoy attent sex.

* Francis 5-1-2 - Hierarchical Regression - Worked Example (pp 120-122).

REGRESSION
  /DESCRIPTIVES MEAN STDDEV CORR SIG N
  /MISSING LISTWISE
  /STATISTICS COEFF OUTS CI R ANOVA CHANGE ZPP
  /CRITERIA=PIN(.05) POUT(.10)
  /NOORIGIN
  /DEPENDENT engach
  /METHOD=ENTER sex sel  /METHOD=ENTER attent enghomwk  .


* Francis 5-2 - Hierarchical Regression - Exercise (pp 121, 256).

REGRESSION
  /DESCRIPTIVES MEAN STDDEV CORR SIG N
  /MISSING LISTWISE
  /STATISTICS COEFF OUTS CI R ANOVA ZPP
  /CRITERIA=PIN(.05) POUT(.10)
  /NOORIGIN
  /DEPENDENT mathsach
  /METHOD=ENTER sel  /METHOD=ENTER attent mathomwk  .


* Francis 5-1-3 - Stepwise Regression - Worked Example (pp 123-125).

REGRESSION
  /DESCRIPTIVES MEAN STDDEV CORR SIG N
  /MISSING LISTWISE
  /STATISTICS COEFF OUTS CI R ANOVA CHANGE ZPP
  /CRITERIA=PIN(.05) POUT(.10)
  /NOORIGIN
  /DEPENDENT engach
  /METHOD=STEPWISE sex sel attent enghomwk  .

* Francis 5-3 - Stepwise Regression - Exercise (pp 125, 257).

REGRESSION
  /DESCRIPTIVES MEAN STDDEV CORR SIG N
  /MISSING LISTWISE
  /STATISTICS COEFF OUTS CI R ANOVA ZPP
  /CRITERIA=PIN(.05) POUT(.10)
  /NOORIGIN
  /DEPENDENT mathsach
  /METHOD=STEPWISE resid sex matusefl sel attent.

* 5-1-4-1 - Practical Issues & Assumptions.

* Scatter ZPRED & ZRESID.
* Histogram ZRESID.
* Normal probability plot.

REGRESSION
  /DESCRIPTIVES MEAN STDDEV CORR SIG N
  /MISSING LISTWISE
  /STATISTICS COEFF OUTS CI R ANOVA CHANGE ZPP
  /CRITERIA=PIN(.05) POUT(.10)
  /NOORIGIN
  /DEPENDENT engach
  /METHOD=ENTER sex sel attent enghomwk
  /SCATTERPLOT=(*ZRESID ,*ZPRED )
  /RESIDUALS HIST(ZRESID) NORM(ZRESID) .

* 5-1-4-1 - Screening for Influential Cases.

REGRESSION
  /DESCRIPTIVES MEAN STDDEV CORR SIG N
  /MISSING LISTWISE
  /STATISTICS COEFF OUTS CI R ANOVA CHANGE ZPP
  /CRITERIA=PIN(.05) POUT(.10)
  /NOORIGIN
  /DEPENDENT engach
  /METHOD=ENTER sex sel attent enghomwk
  /SAVE MAHAL COOK .

* 5-1-4-3 Collinearity Diagnostics (see Tut notes re: Assumptions and Francis p 128).

REGRESSION
  /MISSING LISTWISE
  /STATISTICS COEFF OUTS COLLIN TOL
  /CRITERIA=PIN(.05) POUT(.10)
  /NOORIGIN
  /DEPENDENT engach
  /METHOD=ENTER sex sel attent enghomwk  .


* Francis 5-4 - Practical Issues & Assumptions - Exercise (pp 128, 257).

REGRESSION
  /DESCRIPTIVES MEAN STDDEV CORR SIG N
  /MISSING LISTWISE
  /STATISTICS COEFF OUTS COLLIN TOL ZPP
  /CRITERIA=PIN(.05) POUT(.10)
  /NOORIGIN
  /DEPENDENT mathsach
  /METHOD=ENTER matusefl matenjoy attent sex
  /SAVE MAHAL COOK.