Calculating the Mean
SSAT Upper Level Quantitative · Flashcards · Recall
SSAT UPPER LEVEL QUANTITATIVE · FLASHCARDS
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QUESTION
State the formula for the mean of
n
n
n
numbers
x
1
,
x
2
,
…
,
x
n
x_1, x_2, \dots, x_n
x
1
,
x
2
,
…
,
x
n
.
QUESTION
If you add
k
k
k
to every value in a data set, how does the mean change?
QUESTION
State the mean of equally spaced numbers from
a
a
a
to
b
b
b
(inclusive).
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ANSWER
a
+
b
2
\frac{a+b}{2}
2
a
+
b
. For an arithmetic sequence from
a
a
a
to
b
b
b
, the mean is the midpoint between the first and last terms.
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