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21-1 Questions (a) to (c) refer to the following figure:
1743-1 X Frequency of X
Q: Questions (a) to (c) refer to the following figure:
|
|
Frequency | B
|
| B B
|
| A C
| C C
|
| A A
| C C
| B B
| A C A C
| A C B B A C
|A C B B A C
--------------------------------------------------->
Score
NOTE: Connect the A points with a smooth curve to form
distribution A, the B points with a smooth curve
to form distribution B, and the C points with a
smooth curve to form distribution C.
a. In the figure, which distribution's mean differs from the mean
of the other two distributions?
b. In the figure, which distribution has the smallest standard
deviation?
c. In the figure, is it likely that the mean of distribution A
corresponds closely with the mode of distribution B?
a. Yes b. No c. Cannot be determined
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Q: The sample mean of the following sample
X Frequency of X
-----------------------------------
2 1
3 2
4 3
is: (1) 3
(2) 2
(3) 20
(4) 20/9 = 2.22
(5) 20/6 = 3.33
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21-1
A: a. The mean of distribution C differs from the means of distributions
A and B.
b. Distribution B has the smallest standard deviation.
c. Yes, it is likely that the mean of distribution A corresponds
closely with the mode of distribution B.
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A: (5) 20/6 = 3.33
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Based upon item submitted by R. Shavelson - UCLA
Multiple Choice
PROBABILITY
MEAN STANDARDDEVIATIO DESCRSTAT/P
PARAMETRIC STATISTICS
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Item is still being reviewed
Multiple Choice
CENTRALTENDENCY MEAN
DESCRSTAT/P PARAMETRIC STATISTICS
T= 2 Computation
D= 1 General
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