Descriptive statistics

1
Descriptive statistics

• Open file Adstudy.sta
• Go to Descriptive statistics
• Find mean with a confident interval 95, standard
  deviation, skewdness and kurtosis for all
  measurements.
• Make histograms
• Go to Correlation matrices.
• Check for all the correlations (Measures01-24).
• List all significant coefficients in default
  setting.
• Change the confidence interval to p-valuelt0.01
  and list all significant coefficients.
• Which of these measurements are correlated?
• Produce a scatterplot between Measures 05 and
  09.
• Do the same for MALE and FEMALE groups separately.

2
Descriptive statistics

• Test if MALE and FEMALE groups have identical
  response (t-test for independent samples by
  groups).
• Create BoxWhisker plot for Measures 07, 08, 09.
• Test other Measures. What do the red lines mean?
• Go back to BoxWhisker plot and change the
  Whisker value to the Standard Error. What does
  the difference in Std.Err. between MALE and
  FEMALE groups mean?
• Go to Graph. Make histograms for Measures 05,
  07, 08 and 09 (with normal fit disabled) , and a
  scatterplot for Measures 05 and 09 for the whole
  sample, and separately for MALE and FEMALE
  groups. Do the same by Advert grouping.
• Do Measures 07, 08 and 09 have a normal
  distribution?