revision

• purpose of questionnaires

  • how widespread phenomenon is
  • when little is known about a topic
  • want to collect lots of data in a short space of time
• purpose of questionnaires

  you want to measure something such as?

  facts and knowledge

  past behaviour

  likely future behaviour

  motives

  opinions and attitudes

  psychometrics
• reporting correlations

  r(sample size) = pearsons r, p<
• when reporting p value use < or > when 0.05 or 0.01
• standardised residuals smaller than +- 3 are considered to be outliers
• in the regression equation below, what are the bs called?

  y = a + b1 * X1 + b2*X2 ?

  regression coefficients
• what is the regression equation to predict the number of viewers?

  viewers = 0.059 + 0.165*press + 0.127trailer

  
• overlapping variance = multicollinearity
• homoscedasticity = scatter plot
• what do higher factor loadings mean?

  a higher degree of association between the latent variable and that indicator