Short Answer TypeFrom the following observations:
(i) Calculate the mode
(ii) Calculating the range
0.03, 0.05, 1.04, 0.08, 0.05,
1.03, 0.03, 0.04, 0.07, 0.05,
0.02, 1.00, 0.08
For a particular year, following is the distribution of ages (in hours) of primary school teachers in a particular state.
|
Age (in years) |
No. of teachers |
|
Less than 20 |
11 |
|
21–25 |
32 |
|
26–30 |
51 |
|
31–35 |
49 |
|
36–40 |
27 |
|
41–45 |
6 |
|
46–50 |
4 |
1. Determine the class limits of the fourth class.
2. What is the class size?
3. Construct a cumulative frequency table.
Solution not provided
Draw a frequency polygon for the data given below, without drawing a histogram:
|
Classes |
Frequency |
|
150–160 |
5 |
|
160–170 |
15 |
|
170–180 |
20 |
|
180–190 |
25 |
|
190–200 |
15 |
|
200–210 |
5 |
Heights in cm of 12 students are given below as:
154, 138, 155, 160, 165, 145,
148, 150, 147,151, 166, 152
Make a frequency table taking 145–150 as first class interval.
The daily earning of 30 workers are given below:
|
Daily earning |
No. of workers |
|
0–50 |
3 |
|
50–100 |
7 |
|
100–150 |
4 |
|
150–200 |
5 |
|
200–250 |
4 |
|
250–300 |
3 |
|
300–350 |
2 |
|
350–400 |
2 |
Draw a histogram and a frequency polygon to represent the above data.
For the following data, draw a histogram:
|
Classes |
Frequency |
|
1–4 |
6 |
|
4–6 |
30 |
|
6–8 |
44 |
|
8–12 |
16 |
|
12–20 |
4 |
The distribution of weights (in kg) of 100 people is given below:
|
Weight (in kg) |
Frequency |
|
40–45 |
13 |
|
45–50 |
25 |
|
50–55 |
28 |
|
55–60 |
15 |
|
60–65 |
12 |
|
65–70 |
5 |
|
70–75 |
2 |
Construct a histogram for the above distribution.
If the mean of the following data is 8, then find missing frequency p.
|
xi |
fi |
|
5 |
2 |
|
10 |
P |
|
8 |
5 |
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