Advertisements
Advertisements
Question
Which of the two – the primary or the secondary data – is more reliable and why?
Advertisements
Solution
The word data means information statistical data and of two types
(i) Primary data, (ii) Secondary data
Primary data are reliable and relevant because they are original in character and are collected by some individuals or by research bodies.
APPEARS IN
RELATED QUESTIONS
Explain the meaning of the term Class-size.
Explain the meaning of the term Class-mark.
Explain the meaning of the term True class limits.
Find the mean, median and mode of the following data:
| Class | 0 – 10 | 10 – 20 | 20 – 30 | 30 – 40 | 40 – 50 | 50 – 60 | 60 – 70 |
| Frequency | 4 | 4 | 7 | 10 | 12 | 8 | 5 |
The observation 29, 32, 48, 50, x, x+2, 72, 78, 84, 95 are arranged in ascending order. What is the value of x if the median of the data is 63?
The median of 19 observations is 30. Two more observation are made and the values of these are 8 and 32. Find the median of the 21 observations taken together.
Hint Since 8 is less than 30 and 32 is more than 30, so the value of median (middle value) remains unchanged.
Explain the meaning of the following terms: Class mark
Explain the meaning of the following terms: Frequency
The monthly pocket money of ten friends is given below:
₹ 80, ₹ 65, ₹ 35, ₹ 65, ₹ 50, ₹ 30, ₹ 60, ₹ 35, ₹ 65, ₹ 30
What is the lowest pocket money?
The Empirical relation between the three measures of central tendency is ______.
