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B io Factsheet
September 1997 Number 3

Which Stats test should I use?
"Which statistical test should we use?" is a common question from Biology students. This Factsheet provides simple guidelines on when
each type of statistical test should be used.
The choice of the correct statistical test is all-important…

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Which Stats test should I use? Bio Factsheet


Table 1: Statistical tests for various investigations

INVESTIGATION WHAT IS MEASURED ? NULL HYPOTHESIS STATISTICAL EXPLANATION
TEST

1. Effect of pH on Number of seeds (out of 20, say) Ho: Number of seeds Chi-squared We are comparing observed
seed germination germinating in…

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