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grade11ml_data_handling_quiz1 draws its questions at random from a bank of 21 questions, with full worked solutions for every one.
A few of the question types, with full solutions, so you know what to expect.
A researcher wants to know the average time Grade 11s at a school spend on homework. Which is the POPULATION?
Answer: All Grade 11 learners at the school
\(\text{The population is the WHOLE group you want to know about.}\)
\(\text{The 40 surveyed learners are the sample, not the population.}\)
Why is surveying only the soccer team about sport time a BIASED sample?
Answer: They are not typical of all learners
\(\text{A fair sample must represent the whole population.}\)
\(\text{Soccer players play far more sport than average, skewing the result.}\)
Which of these is NOT a common way to collect data?
Answer: Guessing without asking anyone
\(\text{Data must come from a real source: surveys, interviews, observation or records.}\)
"Favourite subject" is an example of which type of data?
Answer: Categorical
\(\text{Categorical data is made up of labels or groups, not numbers.}\)
"Number of children in a household" is:
Answer: Discrete numerical
\(\text{You cannot have half a child — this is counted in whole steps.}\)
\(\text{Counted data is discrete.}\)