True or False?
The observation that people consistently sleep longer after a particularly active day provides support for restorative theories of sleep function.
I put True.
Answer is False.
Why?
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A random sample of VCE students in a school could be achieved by selecting:
A - students whose VCE candidate number ends in an even number
B - student who walk to school
C - every tenth student walking out of a VCE assembly
D - all students who are enrolled in three or more science studies.
My answer is C - their answer is A.
How can it be A? By choosing only those who end in even numbers isn't a biased sample produced by discrimanting against those students whose VCE number ends with an odd number?
aha what you have to be careful of is not thinking it
similarly, if you assign every person with a number from 1-100,
and select al lthe even numbered participants, you coudl say the odd numbered participants have no chance
but in your case, with their last digit ending in either odd/even
it doesnt' reflect a certain characteristic
whereas every 10th peron leaving the room,
some people might bunch into groups of 4-5, and leave at the same time
so then they all wouldn't have a chance of being selected together
similarly, some ppl might naturally like leaving the room early,
or staying around, until everyone else leaves so its more convenient.
hope it helps