Data distributions
0 of 29 topics done
Data types and categorical displays
1Classify a variable as nominal, ordinal, discrete or continuousOpen, set of 8START2Build a frequency and percentage frequency tableOpen, set of 8START3Build a bar chart from a frequency tableOpen, set of 8START4Construct or read a percentage segmented bar chartOpen, set of 8START
Interpreting categorical displays
5Read values from a frequency table or bar chartOpen, set of 8START6Report on the distribution of a categorical variableOpen, set of 8START
Numerical frequency tables and histograms
7Group numerical data into class intervalsOpen, set of 8START8Construct a histogram from a frequency tableOpen, set of 8START9Read values from a histogramOpen, set of 8START10Choose an appropriate display for a variableOpen, set of 8START
Distribution shape and plots
11Describe the shape of a distributionOpen, set of 8START12Construct a dot plot from raw dataOpen, set of 8START13Construct an ordered stem plot from raw dataOpen, set of 8START
Measures of centre
14Find the mean and the median, and choose between themOpen, set of 8START15Find measures of centre from a frequency displayOpen, set of 8START
Measures of spread
16Work backwards from a mean or medianOpen, set of 8START17Find the range, the quartiles and the IQROpen, set of 8START18Calculate the standard deviation from the formulaOpen, set of 8START
Standard deviation and the empirical rule
Box plots and outliers
20Produce a five-number summary and construct a boxplotOpen, set of 8START21Find the fences and identify outliersOpen, set of 8START22Read values and percentages from a boxplotOpen, set of 8START
Comparing distributions across groups
Logarithmic scales
Normal models and standardised values
25Decide whether the normal model is applicableOpen, set of 8START26Calculate a standard score or actual valueOpen, set of 8START27Compare observations from different distributions using z-scoresOpen, set of 8START28Use z-score boundaries to estimate normal-model percentages and countsOpen, set of 8START29Infer a normal-model mean or standard deviationOpen, set of 8START