2 Ex-2: Measures of Central Tendency
If the weights of 5 ear heads of sorghum are 100, 102, 118, 124 & 126, find the mean weight?
Calculate the mean value for the frequency distribution of weights of sorghum ear heads given below?
Wt of ear head
40-60
60-80
80-100
100-120
120-140
140-160
160-180
180-200
number
6
28
35
55
30
15
12
9
If the weight of sorghum ear heads are 45, 60, 48, 100 & 65, find the median.
Find out the median and mode for the frequency distribution of sorghum ear heads in question no. 2.
Calculate the mode value for the following frequency distribution
C.I
0-10
10-20
20-30
30-40
40-50
50-60
60-70
70-80
Freq.
4
2
18
22
21
19
10
3
Find out the mean, median and mode for weekly wages of 100 workers in a farm
Weekly.wages
Number.of.workers
20-24
4
25-29
5
30-34
12
34-39
23
40-44
31
45-49
10
50-54
8
55-59
5
60-64
2
The following data gives number of flowers observed from 20 plants.Find the arithmetic mean, geometric mean, harmonic mean.
42, 88, 37, 75, 98, 93, 73, 62, 96, 80, 52, 76, 66, 54, 73, 69, 83, 62, 53, 79
Table below gives the distribution of the heights of 60 students in a Senior High school. Find Q1 & Q3
Height
145-150
150-155
155-160
160-165
165-170
170-175
No: of students
3
9
16
18
10
4
Find 𝑃25, 𝑃50& 𝑃75 and D5 and Q2 for the frequency data given below
class
frequency
cf
0-10
11
11
Oct-20
18
29
20-30
25
54
30-40
28
82
40-50
30
112
50-60
33
145
60-70
22
167
70-80
15
182
80-90
12
194
90-100
10
204