Subtest 2 – Math 2026 Expert
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Measures of central tendency - ANSWER ✔✔Mean/arithmetic mean,
median, mode, range
Mean - ANSWER ✔✔The sum of the data values divided by the
number of data values; average
Example: 2, 2, 3, 5, 2, 6, 2, 6, 7, 9, 11
(2 + 2 + 3 + 5 + 2 + 6 + 2 + 6 + 7 + 9 + 11)/11
55/11
Mean = 5
,Median - ANSWER ✔✔-The value in the middle so that there are an
equal number of data values to either side of it
-To find the median, arrange the data values from smallest to largest,
including any repeats, then find the middle value
-If there is an odd number of data values, one of the data values will be
in the middle
-If there is an even number of data values, take the mean of the two
middle values
Example: 2, 2, 3, 5, 2, 6, 2, 6, 7, 9, 11
2, 2, 2, 2, 3, 5, 6, 6, 7, 9, 11
Median = 5
Mode - ANSWER ✔✔-The value repeated most often
-In order to have a mode, some score had to be repeated
Example: 2, 2, 3, 5, 2, 6, 2, 6, 7, 9, 11
Mode = 2
,Range - ANSWER ✔✔The difference between the maximum and
minimum scores
Example: 2, 2, 3, 5, 2, 6, 2, 6, 7, 9, 11
11 - 2
Range = 9
Probability - ANSWER ✔✔-The comparison of the total number of
favorable outcomes to the number of possible outcomes
-Usually expressed in fraction form: total favorable outcomes / total
possible outcomes
-Can also be expressed as percents or decimal values
Plane geometry - ANSWER ✔✔The study of shapes and figures in
two dimensions (the plane)
Solid geometry - ANSWER ✔✔The study of shapes and figures in
three dimensions
Point - ANSWER ✔✔-The most fundamental idea in geometry
-Represented by a dot and named by a capital letter
Line - ANSWER ✔✔-The shortest path connecting two points
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, -Continues forever in opposite directions
-Consists of an infinite number of points
-Named by any two points on the line
-The symbol <—> written on top of two letters is used to denote that line
Line segment - ANSWER ✔✔-A piece of a line
-Has two endpoints and is named by these two endpoints
-The symbol — written on top of two letters is used to denote that line
segment
Ray - ANSWER ✔✔-Has only one endpoint and continues forever in
one direction
-Could be thought of as a half-line
-Named by the letter of its endpoint and any other point on the ray
-The symbol —> written on top of the two letters is used to denote that
ray
Angle - ANSWER ✔✔-Formed by two rays that start from the same
point
-This point is called the vertex; the rays are called the sides o the angle
-Measured in degrees