# Maths for biologists

What is a null hypothesis?
A null hypothesis is a hypothesis that says there is no statistical significance between the 2 variables
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Describe how the scientist would have produced the calibration curve and used it to obtain the results in the graph?
Make up solutions of all the concentration of maltose . Then use a colorimeter and this will show a measurement of colour intensity. Then plot this on a graph to produce calibration curve which concentration can be obtained
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When do you use spearmans rank correlation?
When looking for associations between different measurements from the same sample
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When do you use a chi squared test?
Frequencies will your investigation involve finding the number of individuals in particular categories
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When do you use standard error of the mean and 95% confidence intervals?
When your investigation looks for difference between mean values
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## Other cards in this set

### Card 2

#### Front

Describe how the scientist would have produced the calibration curve and used it to obtain the results in the graph?

#### Back

Make up solutions of all the concentration of maltose . Then use a colorimeter and this will show a measurement of colour intensity. Then plot this on a graph to produce calibration curve which concentration can be obtained

### Card 3

#### Front

When do you use spearmans rank correlation?

### Card 4

#### Front

When do you use a chi squared test?

### Card 5

#### Front

When do you use standard error of the mean and 95% confidence intervals?