BSNS112 Exam Questions and Correct
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Graded
Categorical (Qualitative) data is either:
Ans: Nominal (stand alone/label); or
Ordinal (ordered/ranked)
Numerical (Quantitative) data is either:
Ans: Discrete (whole numbers)
Continuous (infinite options)
Ways to present categorical data:
Ans: Bar graphs (percentages labelled), Pie graphs, Cross tabulations,
Stacked bar graph, clustered bar charts
Range
, 2 | Page
Ans: Maximum - minimum
Variance
Ans: Squared deviation around the mean
Coefficient of variation
Ans: Relative measure of variability
A skewness value more than _____ its standard error is taken to
indicate a ___________ departure from symmetry.
Ans: twice, significant
Left skew
Ans: Negative skew
Right skew