Measurement
What measure of central tendency is obtained by adding all the data values and dividing by the number of values?
(Mean)
What is the range of 6, 8, 12, 15, 20?
(14)
When subtracting polynomials, what must you do first?
(Change the signs inside the second parenthesis.)
In grouped data, what does f represent?
(Frequency)
Which measure is most affected by outliers?
(Mean)
Which measure is the middle value of an arranged data set?
(Median)
What is the midpoint of the class interval 20–24?
(22)
Simplify: (3x + 5) + (2x − 4).
(5x + 1)
If Σfx = 420 and Σf = 20, find the mean.
(21)
Which measure is best used when the data contains extreme values?
(Median)
Which measure is the value that appears most often?
(Mode)
Find the lower boundary of 15–19.
(14.5)
Simplify: (8y − 6) − (3y + 2).
(5y − 8)
Name the class that contains N ÷ 2.
(Median Class)
If no value repeats in a data set, what is the mode?
(No Mode)
Find the mean: 8, 10, 12, 14, 16.
(12)
Find the midpoint of 45–49.
(47)
Combine like terms: 7a + 5a − 2a.
(10a)
Which class has the highest frequency?
(Modal Class)
A data set has two values occurring most often. What is it called?
(Bimodal)
Find the median: 4, 6, 8, 10.
(7)
Find the lower boundary of 60–64.
(59.5)
Simplify: (5x² + 3x − 1) + (2x² − x + 4).
(7x² + 2x + 3)
True or False: Only like terms can be combined.
(True)
Simplify: (6m − 4n + 8) − (2m + n − 5).
(4m − 5n + 13)