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Author Question: The following observations are given for two variables.yx5281218320622113019101879a.Compute and ... (Read 63 times)

Ale

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Question 1

The following is a frequency distribution of grades of a sample of statistics examinations.

 

Grade

Frequency

50 - 59

  7

60 - 69

10

70 - 79

22

80 - 89

15

90 - 99

  6


Compute the following measures:
 

a.The mean
b.The variance
c.The standard deviation
d.The coefficient of variation



Question 2

The following observations are given for two variables.

 

y

x

  5

  2

  8

12

18

  3

20

  6

22

11

30

19

10

18

  7

  9


 

a.Compute and interpret the sample covariance for the above data.
b.Compute the standard deviation for x.
c.Compute the standard deviation for y.
d.Compute and interpret the sample correlation coefficient.



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Marked as best answer by Ale on Mar 25, 2023

ElaneShive

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Ale

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Reply 2 on: Mar 25, 2023
:D TYSM


nguyenhoanhat

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Reply 3 on: Yesterday
Great answer, keep it coming :)

 

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