Maths Skills 2 (OCR A-Level Biology A): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Which variable is plotted on the x-axis of a graph?
Which variable is plotted on the x-axis of a graph?
Independent variable
In logarithmic scales, what does one cycle represent?
In logarithmic scales, what does one cycle represent?
One order of magnitude
Which type of data consists of whole numbers obtained by counting?
Which type of data consists of whole numbers obtained by counting?
Discrete data
Approximately what % of values lie within ±2 SD of the mean?
Approximately what % of values lie within ±2 SD of the mean?
95%
What is the formula for standard error of the mean (SEM)?
What is the formula for standard error of the mean (SEM)?
SD/√n
If 95% CL error bars overlap, what does this indicate?
If 95% CL error bars overlap, what does this indicate?
Difference definitely not significant
Which test compares observed results with expected ratios using categoric data?
Which test compares observed results with expected ratios using categoric data?
Chi-squared test
What does a Spearman's rank correlation value of +1 indicate?
What does a Spearman's rank correlation value of +1 indicate?
Perfect positive correlation
Which test compares before/after measurements on the same individuals?
Which test compares before/after measurements on the same individuals?
Paired t-test
What does df = (nx-1) + (ny-1) calculate for?
What does df = (nx-1) + (ny-1) calculate for?
Unpaired t-test degrees of freedom