Summary Statistics for a Quantitative Variable
AP Statistics · Flashcards
AP STATISTICS · FLASHCARDS
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QUESTION
What does a positive kurtosis indicate?
QUESTION
Find the z-score for
x
=
10
x = 10
x
=
10
given
x
ˉ
=
8
\bar{x} = 8
x
ˉ
=
8
,
s
=
2
s = 2
s
=
2
.
QUESTION
Calculate the weighted mean for
x
:
3
,
5
,
7
x: 3, 5, 7
x
:
3
,
5
,
7
with weights
2
,
3
,
5
2, 3, 5
2
,
3
,
5
.
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ANSWER
x
ˉ
w
=
5.8
\bar{x}_w = 5.8
x
ˉ
w
=
5.8
.
2
(
3
)
+
3
(
5
)
+
5
(
7
)
2
+
3
+
5
=
58
10
=
5.8
\frac{2(3) + 3(5) + 5(7)}{2+3+5} = \frac{58}{10} = 5.8
2
+
3
+
5
2
(
3
)
+
3
(
5
)
+
5
(
7
)
=
10
58
=
5.8
.
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