Flashcards
Stats Tests
Cards in this deck (16)
- 1What is the null hypothesis?The opposite of the hypothesis, thus it can be proved or disproved.
- 2How do you set up a Spearman's rank table?n | (v1) height | (V1) rank | (V2) weight | (V2) rank | (D) R1-R2 | D squared
- 3Spearman's rank final sentenceBecause our value was greater than the critical value, we reject the null hypothesis and accept that there is a significant correlation.
- 4What do we use Spearman's rank for?Seeing if there's a significant correlation between two sets of measurements.
measurements, correlations - 5What do we use the Chi - Squared test for?Comparing an observed frequency with the expected one to see if there is a significant difference.
Frequency, observed, expected. - 6Chi Squared test tablePhenotype |E. ratio | E. Values |O. Values |O - E | (O-E squared)/E
- 7Chi Squared final sentenceOur value for chi squared is less than the critical value so we accept the null hypothesis, and accept that there is no significant difference between expected and observed results.
- 8Degrees of Freedomn - 1 for Chi Squared and T Test
n for Spearman's - 9Why do we use standard deviation?To measure how spread out the data is by comparing it to the mean. Smaller = closer together
- 10Standard Deviation Equation
- 11Standard Deviation TableMollusc no. | Shell length (x) | x squared
| sum x squared - 12Why do we use T Test?To compare two sets of data to see if there is a significant difference. The data is in the form of measurements.
Measurement, comparing data - 13T Test TableSite A (x1) | X1 squared | Site B (x2) | X2 squared
Mean standard deviation for X1 | " for X2 - 14T Test equation
- 15Chi squared equation
- 16Spearman's rank equation
Information
- Description
- AS level Biology Flashcards on Stats Tests, created by Victoria Starling on 02/11/2017.
- Created by
- Victoria Starling
- Views
- 1
- Rating