you help me with question 56 a. class 3 has the highest mean score, because from the graph we can see that more frequencies are above 60 while the other 2 classes around 60. b. class 3 has the highest median score. it is neg

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can you help me with question 56

a.

class 3 has the highest mean score, because from the graph we can see that more frequencies are above 60 while the other 2 classes around 60.

b.

class 3 has the highest median score. it is negatively skewed, we have already said that it has larger mean. And for a negatively skewed distribution mean less than median. so median of class 3 is larger

C
since class one and class three has symmetric
distribution around 60 their mean and median are
approximately same and at 60. but for class 3 it is
negatively skewed. median will always be greater
than mean. so the difference between mean and
median is high at class 3
d
class 1 has the smallest standard deviation.
Because it is symmetric around 60 and the
frequencies are decreasing gradually for those
points away from mean.
e
with same argument made in (d) we can conclude
that class 1 has smallest Inter Quartile Range.
Transcribed Image Text:C since class one and class three has symmetric distribution around 60 their mean and median are approximately same and at 60. but for class 3 it is negatively skewed. median will always be greater than mean. so the difference between mean and median is high at class 3 d class 1 has the smallest standard deviation. Because it is symmetric around 60 and the frequencies are decreasing gradually for those points away from mean. e with same argument made in (d) we can conclude that class 1 has smallest Inter Quartile Range.
d) Wh.
e) Which class had the smallest IOI
56. Test scores, again. Look again at the histograms of test
a) Overall, which class do you think performed better on
the test? Why?
b) How would you describe the shape of each distribution?
c) Match each class with the corresponding boxplot.
100 H
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Transcribed Image Text:d) Wh. e) Which class had the smallest IOI 56. Test scores, again. Look again at the histograms of test a) Overall, which class do you think performed better on the test? Why? b) How would you describe the shape of each distribution? c) Match each class with the corresponding boxplot. 100 H 08.5 8 obodautnd Cod 000 80 E 60 ric 20 E Re A B C T 57 Ouelit ed concerns that the n
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