Cat 1 sst answer

CAT 1 ANSWERS

S
1. C .V   100
X

5 . 60
C .V A   100  12 . 14 % (1 mark)
19 . 50

5 .67
C .V B   100  7 . 304 % (1 mark)
32 . 60

7 . 20
C .V C   100  11 . 98 % (1 mark)
22 . 40

Company B. (1 mark)

It is more consistent (Has lower C.V) (1 mark)

2. A4
1/  1,  2/  20 and  3/  40
1/  X  A  X  4
1 X  4  X  5 (2 marks)


Variance   2   2/  ( 1/ ) 2  20  12  19 (2 marks)

 3   3/  31/  2/  2( 1/ ) 3  40  3(1)( 20 )  2(1) 3  18 (2 marks)

3( mean  median )
3. Coefficient of skewness 

3( 900  25)
 50  3 . 5 (1 mark)
6
The distribution is negatively skewed or left skewed. (1 mark)

1

4. Geometric mean  (12 .3  12 .1  12 .2  12 .3  12 .4) 5
 12 .26 (1 mark) (1 mark)

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