12 questions found
For the following two (02) items :
Consider the following distribution having median value 24 :
| Marks | Number of Students |
|---|---|
| Less than 10 | 5 |
| Less than 20 | 30 |
| Less than 30 | 30 + k |
| Less than 40 | 48 + k |
| Less than 50 | 55 + k |
What is the mean of the distribution?
The sum of the deviations of a set of numbers measured from 15 is and the sum of the deviations of the same numbers measured from is . What is the arithmetic mean ?
The numbers are written in descending order and their median is . What is/are the values of ?
A distribution consists of 3 components with frequencies 45, 40 and 55 having their means 2, 2.5 and 2 respectively. What is the mean of the combined distribution?
The frequency distribution of marks of 100 candidates in a particular examination is as follows :
| Marks | Number of Candidates |
|---|---|
| More than 10 | 100 |
| More than 20 | 75 |
| More than 30 | 60 |
| More than 40 | 40 |
What are the average marks of the candidates?
For the following two (02) items :
The following data represent the distance covered (in metres) by two groups of athletic children. It is known that the median distance in the first group is 20·8 metres while the mean distance in the second group is 17·3 metres. Some frequencies in both the groups are missing :
| Distance Class | First Group | Second Group |
|---|---|---|
| 0-5 | u | 3u |
| 5-10 | v | 2v |
| 10-15 | 11 | 40 |
| 15-20 | 52 | 50 |
| 20-25 | 75 | 30 |
| 25-30 | 22 | 28 |
What is the value of u?
Which measure of central tendency is least affected by the presence of extreme observations in the data?
To find the average ratio like price/unit, work done/hour, kilometre/hour under certain conditions, the suitable measure of central tendency applicable is
The arithmetic mean of 200 observations is 60. If 5 is multiplied to each observation, then what will be the new arithmetic mean?
Which one of the following is a positional average?
(a) Arithmetic mean
(b) Median
(c) Mode
(d) Geometric mean
For the following two (02) items :
The following data represent the distance covered (in metres) by two groups of athletic children. It is known that the median distance in the first group is 20.8 metres while the mean distance in the second group is 17.3 metres. Some frequencies in both the groups are missing :
| Distance Class | First Group | Second Group |
|---|---|---|
| 0-5 | u | 3u |
| 5-10 | v | 2v |
| 10-15 | 11 | 40 |
| 15-20 | 52 | 50 |
| 20-25 | 75 | 30 |
| 25-30 | 22 | 28 |
What is the value of v?
For the following two (02) items :
Consider the following distribution having median value 24 :
| Marks | Number of Students |
|---|---|
| Less than 10 | 5 |
| Less than 20 | 30 |
| Less than 30 | 30 + k |
| Less than 40 | 48 + k |
| Less than 50 | 55 + k |
What is the value of k?
