A level biology maths skills

• precent change = ((final- original) / original) * 100
• rate of change when dependent varible is time to produce a given volume?

  rate = volume/time
• rate when total time to complete a task?

  rate = 1/time
• magnification= image/ actual
• dilutions: volume of solution to add = (concentration wanted/concentration provided) * total volume wanted
• dilutions: the volume of diluting agent = total volume required - volume of solution to add
• cm-> *10-> m -> *1000 -> mm ->*1000->um -> *1000-> nm
• Surface area of a cube = 6s^2
• Volume of a cube = s^3
• what statistical test should you use to compare two sets of data?

  T-test
• If the result to a T-test is larger than the p-value what does that mean?

  Reject the null hypothesis
• What statistical test should you use to look if there is a significant difference between the observed results to the expected?

  chi-squared
• what test should you use to test if there is correlation present between two sets of data?

  correlation coefficent
• what is an example of a correlation coefficent test?

  Spearman's rank
• what will the range of results to a correlation coefficent test be?

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