this is the easiest question ever what the fk
Answer is C.
The sample is selected at tandon from the population, but it was done on a particular day of the week. So the sample is not random.
More data should be taken, distributed on every day of the week, probably in different months.
Your answer would have to be 69with the remainder of 1
(open the picture for the shown work :) )
the local maximum is at x = -2.2 and has a value of 72.576