Explore
The Explore procedure provides a variety of visual
and numerical summaries of the data, either for all cases or
separately for groups of cases. The dependent variable must be ratio,
while the grouping variables
may be interval or nominal.
With the Explore procedure, you can:
Screen data
Identify outliers
Check assumptions
Characterize differences among groups of cases
1. Move the dependent variable over to the right
2. Move the grouping variable into the factor box
3. Click on the appropriate radial button for what you would like to display
in the output
Both- Statistics and Plots (not worth doing)
Statistics: displays the following (you may have to click
the statistics button and activate these)
Descriptives- include
the mean, median, 5% trimmed mean, standard error, variance,
standard deviation,
minimum, maximum, range, and interquartile range, shape
of the distribution;
skewness, kurtosis, and 95% confidence interval for the mean.
M-Estimaters- Robust
alternatives to the sample mean and median for estimating the center of location.
(not worth doing)
Outliers- (NOTE:
not real outliers) Displays the five largest and five smallest values
Percentiles- displays
various percentiles
Plots: displays the following (you may have to click
the plots button and activate these)
Plots include Stem and Leaf displays and boxplots (not worth doing)
4. The output gives you boxes, depending upon what you selected, the information.
1. Case Processing Summary: Gives you the Sample Size
(N), amount of missing cases and
the percentages of valid and missing
cases.
2. Descriptives: Gives you all the information you asked
for in Descriptives
The first variable name in the upper left corner is the
dependent variable measured.
The second is the grouping variable that the discriptives
will be sorted by.
Measures of central tendency include
the mean, median, and 5% trimmed mean.
Measures of dispersion include standard
error, variance, standard deviation, minimum,
maximum, range, and interquartile range.
The descriptive statistics also include
measures of the shape of the distribution; skewness
and kurtosis are displayed with their standard errors.
The 95% level confidence interval for
the mean is also displayed.
3. Percentiles: Gives the value for the 5th, 10th, 25th,
50th, 75th, 90th, and 95th percentiles
4. Extreme Values: Gives the five lowest and five highest
value as well as the case number for it