Question 10
EasyOriginal questionA principal wants to know the average daily screen time of the 1,200 students in her school. She picks 60 students by drawing names at random from the full roll and finds that they average 3.2 hours a day.
Which of these is a parameter in the principal's screen-time study?
Show the answer and explanation
CorrectNot quiteAnswer C
Correct answer: C
Explanation
A parameter is a value describing the whole population.
The school-wide mean is that value; she does not know it yet.
Worth noting
The 60 students' mean is a statistic, worked out from the sample.
- Concept
- Parameter and statistic
- Typical timeTypical
- 90 s
- Your timeYours
- —
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