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5 Written questions
5 Multiple choice questions
 is a variable which represents a measurable quantity,
one which can be represented by a number.  of a quantitative data set is a summary of the center of the data set.
It is computed by adding the data elements together and dividing by N, the number of
data elements.  N=n1*n2/k
 is a sampling technique in which every member of the population should have the same (random) chance of being in the sample as any other member of the
population.  25/100 * N
5 True/False questions

Q3 → 25/100 * N

confounding variable → is a variable which represents a measurable quantity,
one which can be represented by a number. 
outlier → is an alternative to a census, in which data is collected from only some members of the population.

fivenumber summary → of a quantitative data set is a summary of the center of the data set.
It is computed by adding the data elements together and dividing by N, the number of
data elements. 
sample bias → of a quantitative data set is a summary of the center of the data set.
It is computed by adding the data elements together and dividing by N, the number of
data elements.