The small sample is called as statistics while the whole population is called as Parameter.
What is Statistic?
"A parameter is a fixed measure describing an entire population (a mass of all units under consideration that shares common characteristics) based on all the elements within that population."
What is Parameter ?
"A statistic is a characteristic of a sample. "
In the first statement,
It is not sure that who 80% has scored lower than 80 strokes, so it parameter.
Similarly,
In the second statement it not sure who all plays football on weekends, only 26% plays it on weekends so it is parameter.
But, in the third statement, its clear that 3 out of 5 matches they won, so it's statistic.
Similarly, 78% of people bought popcorn , not sure who they are, so it is parameter.
Hence ,
Statement 1, 2 and 4 are parameter while Statement 3 is statistic.
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