CALCULATE MODE MID VALUE FREQUENCY 1 8 2 6 3 10 4 12 5 20 6 12 7 5 8 3 9 2 10 4Required to answer. Single choice.
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Answers
Answer:
Page No 238:
Question 1:
Marks of 15 students in their Economics paper are:
6, 9, 10, 12, 18, 19, 23, 23, 24, 28, 37, 48, 49, 53, 60
Find the median marks.
ANSWER:
S. No. Marks
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15 6
9
10
12
18
19
23
23
24
28
37
48
49
53
60
N = 15
Median = size of (N+12)th item
or, M = size of (15+12)th item
or, M = size of 8th item
⇒ M = 23
Therefore, the median marks in the economics paper is 23.
Page No 238:
Question 2:
Height of seven students is measured in cm as,
140, 142, 144, 145, 147, 149, 151
Find the median height.
ANSWER:
S.No Height (cms)
1
2
3
4
5
6
7 140
142
144
145
147
149
151
N = 7
Median = Size of (N+12)th item
or, M= Size of (7+12)th item
or, M= size of 4th item
⇒ M= 145
Hence, the median height is 145 cm.
Page No 238:
Question 3:
Weight of eight students in kg is noted as,
71, 72, 64, 68, 70, 76, 73, 75
Find the median weight.
ANSWER:
Arranging the series in the ascending order
S. No. Weight
1
2
3
4
5
6
7
8 64
68
70
71
72
73
75
76
N = 8
Median=Size of (N2)th item+Size of (N2+1)th item2 or, M =Size of (82)th item+Size of (82+1)th item2 or, M =Size of 4th item+Size of 5th item2 or, M=71+722=1432 ⇒ M=71.5 kgs
Explanation:
please follow me. mark in brain list
Explanation:
mode
1-1
8-2
2-2
6-2
3-2
10-2
4-2
12-12
5-2
20-1
7-1
9-1 mode is 5,12,4,10,3,6,2,8