Bio Stats

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Null Hypothesis

For Spearman Rank

There is no association /

correlation between _____________ and _____________.

For Standard Error and

95% Confidence Limits

There is no

difference between the mean number of _____________ in different conditions.

For χ2

There is

no difference between the observed results and the expected results

The purpose of any statistical test is

to determine the probability of a set of results being due to chance.

Spearman Rank

Value less than critical value

- Chance greater than p=0.05

- Accept null hypothesis

Value greater than critical value

- Chance less than p=0.05

- Reject null hypothesis

Standard Deviation

If confidence limits overlap

- No significant difference

- Chance greater than p=0.05

- Accept null hypothesis

If confidence limits don't overlap

- Significant difference

- Chance less than p=0.05

- Reject null hypothesis

Chi Square

Value less than critical value

- Chance greater than p=0.05

- Accept null hypothesis

Value greater than critical value

- Change less than p=0.05

- Reject null hypothesis