Question

Gah! hate vague math questions!
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Class A Class B Class C
80 72 100
85 90 90
87 85 94
92 84 100
86 91 75
90 78 30
94 94 94
100 86 72
75 82 85
45 78 87
85 86 42
38 78 100
72 95 90
94 90 94
62 88 60
Explain how the values for Classes A and B vary about the mean and median. What information does this give Mrs. Smith?

Answer 1

For A
Mean 79
Standard Error 4.658836969
Median 85
Mode 85
Standard Deviation 18.04359799
Sample Variance 325.5714286
Kurtosis 0.995893331
Skewness -1.300811891
Range 62
Minimum 38
Maximum 100
Sum 1185
Count 15

For B
Mean 85.13333333
Standard Error 1.695559092
Median 86
Mode 78
Standard Deviation 6.566872126
Sample Variance 43.12380952
Kurtosis -0.4808087
Skewness -0.370058534
Range 23
Minimum 72
Maximum 95
Sum 1277
Count 15

Answer 2

@phi just so tired after all this....

Answer 3

so with the mean being to the left of the meadian, you need to look at skewness...

the Class B data has mean and median almost equal, so it would appear to be a symmetrical data set

hope it helps

Answer 4

all I need to know is how the mean and median vary and what it tells mrs smith, my brain is shutting down slowly after studying all day

Answer 5

-face desk- blaaaaaarghhh

Answer 6

@ganeshie8

Answer 7

here is a diagram that may help

Answer 8

***all I need to know is how the mean and median vary and what it tells***

if the mean and median are close you the distribution is symmetric (not skewed left or right).