A frequency polygon is a line graph of a cumulative frequency distribution.
Indicate whether the statement is true or false
Q. 2When considering area under the standard normal curve, decide whether the area to the left of z = -2.5 is
bigger than, smaller than, or equal to the area to the right of z = 2.
A) smaller than B) bigger than C) equal to
Q. 3When calculating the mathematical expectation, amounts which represent losses are assigned _______ values.
Fill in the blank(s) with correct word
Q. 4Assume that P(C) = 0.5 and P(D) = 0.3. If C and D are independent, find P(Cand D).
A) 0.3 B) 0.5 C) 0.15 D) 1.5
Q. 5The means of many samples drawn from the same population usually do not fluctuate widely.
Indicate whether the statement is true or false
Q. 6If the difficulty level of books is ranked from 1 to 10, a set of data rankings of books falls into the category of
_______
data.
Fill in the blank(s) with correct word
Q. 7If we wish to compare the average PSAT scores of boys and girls taking Statistics at a high school, which would be the best way to gather these data?
A) SRS
B) census
C) stratified sample
D) observational study
E) experiment
Q. 8It is possible for the class boundaries of an interval to be the same as its class limits.
Indicate whether the statement is true or false
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