Question

1. Find the mean of :
(i) 7, 10, 4 and 17
(iii) 3, 1, 5, 4, 4 and 7
(v) 2.1, 4.5, 5.2, 7.1 and 9.3
(ii) 12, 9, 6, 11 and 17
(iv) 7,5, 0, 3, 0,6, 0, 9, 1 and 4
(vi) 5, 2-4, 6-2, 8.9, 4.1 and 3.4​

Answer 1

Answer:

Step-by-step explanation:

(i) 7, 10, 4 and 17

Required mean = Sum of data values/No. of data values

= (7 + 10 + 4 + 17)/4

= 3.8/4 = 9.5

(ii) Mean of 12, 9, 6, 11 and 17

= Required mean = Sum of data values/No. of data values

= (12 + 9 + 6 + 11 + 17)/5

= 55/5 = 11

(iii) Mean of 3, 1, 5, 4, 4 and 7

= Required mean = Sum of data values/No. of data values

= (3 + 1 + 5 + 4 + 4 + 7)/6

= 24/6 = 4

(iv) Mean of 7, 5, 0, 3, 0, 6, 0, 9, 1 and 4

Required mean = Sum of data value/No. of data values

= (7 + 5 + 0 + 3 + 0 + 6 + 0 + 9 + 1 + 4)/10

= 35/10 = 3.5

(v) Mean of 2.1, 4.5, 5.2, 7.1 and 9.3

Required mean = Sum of data values/No. of data values

= (2.1 + 4.5 + 5.2 + 7.1 + 9.3)/5

= 28.2/5 = 5.64

(vi) Mean of 5, 2.4, 6.2, 8.9, 4.1 and 3.4

Required mean = Sum of data values/No. of data values

= (5 + 2.4 + 6.2 + 8.9 + 4.1 + 3.4)/6

= 30/6 = 5

Answer 2

Answer:

i) 7+10+4+17/4=

38/4=9.5 is the mean

ii) 3+1+5+4+4+7/6=

24/6= 4 is the mean

iii) 2.1+4.5+5.2++7.1+9.3/5=

28.2/5= 5.64 is the mean

iv) 12+9+6+11+17/5=

55/5= 11 is the mean

v) 7+5+0+3+0+6+0+9+1+4/19=

28/9= 3.11111 is the mean.

vi) 5+2+-4+6+-2+8.9+4.1+3.4/8=

23.4/8= 2.925 is the mean