Contents: Statistical Comparison of Soil Chemistry Values for Suspected Fields on Pleistocene and Holocene Terraces
Description: Quantitative data on soils were evaluated using a series of F tests to determine if statistically significant differences exist betweeen Pleistocene and Holocene terraces. The F test is a statistical test to measure differences in variance between two populations. This test assumes that errors are normally distributed about a mean of zero and that there is homogeneous population variance. Statistical differences were tested at the .01 and .05 levels of significance. Separate tests were conducted by soil horizon, as well as by the soil as a whole. For statistical purposes, the few transitional BA horizons that were sampled were included with the dominant horizon, namely, the B horizon. See susp for raw data.
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Columns:
| Name | Type | Size | Contents |
| chemical | VARCHAR | 25 | Chemical |
| horizon | VARCHAR | 25 | Horizon |
| pleist_mean | Number | Single | Pleistocene Mean |
| pleist_stand_dev | Number | Single | Pleistocene Standard Deviation |
| pleist_var | Number | Single | Pleistocene Variance |
| holo_mean | Number | Single | Holocence Mean |
| holo_stand_dev | Number | Single | Holocene Standard Deviation |
| holo_var | Number | Single | Holocene Variance |
| f | Number | Single | F |
| df | VARCHAR | 25 | Degrees of Freedom |
| significance | VARCHAR | 10 | Significance |