BSNS 112 EXAM PREPARATION QUESTIONS AND ANSWERS GRADED A+ 2025/2026

BSNS 112 EXAM PREPARATION
QUESTIONS AND ANSWERS GRADED A+
2025/2026




Descriptive statistics - ANS - methods of organising, summarising and presenting data in a
good form

e.g. graphs, tables, measures



Inferential statistics - ANS Random sample of data taken from a population to describe and
make inferences about the population



Types of data - ANS quantitative and qualitative



Quantitative data - ANS Numerical

e.g. Age in years



Qualitative data - ANS Grouped or categorical

e.g. S, M, L, XL, XXL



Categorical data (Qualitative) - ANS Nominal or Ordinal



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, Numerical data (Quantitative) - ANS Discrete or Continuous



Frequency - ANS x



Proportion - ANS p



Mean - ANS average



Median - ANS middle number



Mode - ANS most common number



Trimmed mode - ANS most common number with extreme 5% trimmed



Central locations - ANS Mean

Median

Mode

Trimmed Mode



Measures of spread - ANS Range

Interquartile range

Variance



Range - ANS Max observation less Minimum




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