Analysis of Variance PDP-5/8
| 5,8-9 |

Henry Burkhardt, Digital Equipment Corporation, Maynard,

Massachusetts

An analysis of variance program for the standard PDP-5/8

configuration. The output consists of:

- For each sample:
- sample number
- sample size
- sample mean
- sample variance
- sample standard deviation

- The grand mean
- Analysis of Variance Table:
- the grand mean
- the weighted sum of squares of class meansabout the grand mean
- the degrees of freedom between samples
- the variance between samples
- the pooled sum of squares of individual valuesabout the means of their respective classes
- the degrees of freedom within samples
- the variance within samples
- the total sum of squares of deviations from thegrand mean
- the degrees of freedom
- the total variance
- the ratio of the variance between samples tothe variance with samples.

This is the standard analysis of variance table that can be

used with the F test to determine the significance, if any,

of the differences between sample means. The output is also

useful as a first description of the data.

Catalog: | June 1968 |