Z857-作业与答案-《英语测试》作业
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2021年01月17日 01:44
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《英语测试》作业
1
．
dentify the scales represented by the following kinds of data.
2
．
iven the following raw score distribution on a spelling test of 25 items, calculate (a) ordinal
ratings, (b) percentage scores, (c) percentile ranks: 6, 8, 9, 11, 12, 12, 14, 15, 19, 19, 21, 25.
3
．
If you administered a multiple- choice test of phrasal verb usage to a class of ten students and
got the following distribution of scores: 11, 13, 16, 16, 18, 20, 20, 25, 27, 29, what would be the
corresponding
z-scores,
T-scores,
and
normal
distribution
area
proportions
if
the
standard
deviation
is 5.95?
4
．
In a normal distribution, what proportion of the scores lie between plus and minus one standard
deviation? Between plus and minus two standard deviations?
5
．
Compute
item
difficulty
and
the
proportion
incorrect
for
each
of
the
items
in
the
following
scoring
matrix. Identify items for rejection.
Items
1
2
3
5
6
7
8
9
10
1
1
1
1
1
0
1
1
0
1
0
2
0
1
1
0
1
1
1
1
1
1
3
1
0
0
1
0
1
0
0
0
1
4
1
0
0
0
0
1
0
1
0
0
5
1
0
1
1
0
0
1
0
1
1
Examinees
4
6
．
Look
at
the
following
paired
scores
on
listening
comprehension
(X)
and
general
proficiency
(Y)
for
ten students.
X
25
13
15
19
17
16
21
24
Y
18
21
22
27
31
22
29
33
第
1
页
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1
页
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22
21
26
29
Compute
the
correlation
coefficient
for
these
scores. Please
do
a
one-tailed
Pearson
test
to
determine
whether it is significant on the level of significance of <.05?
7
．
Nine students have taken two different aptitude tests and got the following test result. Compute
the Pearson product moment correlation coefficient. And determine whether it is significant on the
level of significance of <.05?
Student No. 01
02
03
04
05
06
07
08
09
Test A
56
60
61
62
65
67
71
71
74
Test B
34
26
62
30
30
28
34
36
40
8
．
Look at the following scoring matrix for twenty students:
Item
Student
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
1
1
0
0
1
1
1
0
1
1
0
0
1
1
1
0
0
1
0
1
0
1
1
1
1
1
0
1
1
1
0
1
1
1
1
1
1
0
1
1
1
0
0
0
1
0
1
0
0
0
1
0
0
0
1
0
1
0
0
1
1
0
1
0
1
1
0
1
1
1
0
1
1
0
1
0
1
1
1
1
1
1
0
1
0
1
1
1
1
0
1
1
0
1
1
1
0
1
1
1
4
3
2
2
4
4
3
3
4
3
2
3
3
3
5
2
3
3
3
5
1
2
3
4
5
Score
Compute the point biserial correlation coefficient for each of the five items with total score.
9
．
What do we mean by correlation in statistics?
10
．
Please state the difference between the classroom tests and external tests.
11
．
Make a simple clarification on the Classical True Score Model and enumerate its demerits.
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12
．
Please write five multiple- choice items on some grammatical elements (tense, agreement, etc.).
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1
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1
页
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