BSNS 112: Practice Exam with Solved Solutions.

BSNS 112: Practice Exam with Solved
Solutions.
Population vs Sample Notation - Mean - Answer population = μ

sample = 𝑥



Population vs Sample Notation - standard deviation - Answer population = 𝜎

sample = s



Population vs Sample Notation - Variance - Answer population = 𝜎2

sample = s2



Population vs Sample Notation - Proportion - Answer population = p

sample = p̂



Population vs Sample Notation - Sample size - Answer population = N

sample = n



simple random sampling - Answer A sampling procedure in which each member of the
population has an equal probability of being included in the sample. e.g. taking every 10th
person from the population



cluster sampling - Answer A probability sampling technique in which clusters of participants
within the population of interest are selected at random, followed by data collection from all
individuals in each cluster. e.g. out of all first year students, only sampling UniCol



stratified sampling - Answer population is divided into subgroups (based on characteristics)
and then sample a certain number from each group. e.g. forced diversity.



qualitative data - Answer descriptive data - "words"



Quantitative data - Answer numerical data - "numbers"



ordinal and nominal data - Answer Qualitative Data:

- Ordinal - "can put them in order" (e.g. clothes sizes, S,M,L)

- Nominal - "just names no order" (e.g. colour)