Question

2. Consider the following scores on a mid-term exam.

Emma	60
Noah	75
Olivia	95
Mason	80
Liam	65
Sophia	82
Isabella	75
Ethan	98
James	93
Charlotte	87

2a. What is the mean of the mid-term test scores?

2b. What is the standard deviation of the mid-term test scores?

2c. What is the coefficient of variance for the mid-term tests scores?  

2. Consider the following scores on a mid-term exam.

Emma	60
Noah	75
Olivia	95
Mason	80
Liam	65
Sophia	82
Isabella	75
Ethan	98
James	93
Charlotte	87

2a. What is the mean of the mid-term test scores?

2b. What is the standard deviation of the mid-term test scores?

2c. What is the coefficient of variance for the mid-term tests scores?  

Answer 1

2)

S.No	X1		X12
1	60.000		3600.0000
2	75.000		5625.0000
3	95.000		9025.0000
4	80.000		6400.0000
5	65.000		4225.0000
6	82.000		6724.0000
7	75.000		5625.0000
8	98.000		9604.0000
9	93.000		8649.0000
10	87.000		7569.0000
ΣX	810	ΣX2	67046.0000
=Σx/n=	81.000	s12=(Σx2-(Σx)2/n)/(n-1)=	159.556
		s1=√s12                                =	12.632
Coefficient of variation = s/x =			15.59%

from above :a )mean =81.00

b) std deviation =12.632

c) coefficient of varation =(s/x)*100 =15. 59%