Advertisements
Advertisements
Question
If the median of `x/5,x/4,x/2,x and x/3`, where x > 0, is 8, find the value of x.
Hint Arranging the observations in ascending order, we have `x/5,x/4,x/3,x/2,x Median= x/3=8.`
Solution
Arranging the observations in ascending order, we have
`x/5,x/4,x/3,x/2,x`
๐โ๐ข๐ ,๐กโ๐ ๐๐๐๐๐๐ ๐๐ `x/3`
โน`x/3=8`
โน ๐ฅ=3×8
โน ๐ฅ=24
Thus, the value of x is 24.
APPEARS IN
RELATED QUESTIONS
What do you understand by the word “statistics” in
(i) Singular form
(ii) Plural form?
Describe some fundamental characteristics of statistics.
Which of the two – the primary or the secondary data – is more reliable and why?
Explain the meaning of the term Class-size.
Explain the meaning of the term Class limits.
Explain the meaning of the term Frequency.
Define cumulative frequency distribution.
Explain the difference between a frequency distribution and a cumulative frequency distribution.
Find the mean, median and mode of the following data
Class | 0 – 20 | 20 – 40 | 40 – 60 | 60 – 80 | 80 – 100 | 100 – 120 | 120 – 140 |
Frequency | 6 | 8 | 10 | 12 | 6 | 5 | 3 |
Find the class marks of classes 10 -25 and 35 – 55.
The distribution X and Y with total number of observations 36 and 64, and mean 4 and 3 respectively are combined. What is the mean of the resulting distribution X + Y?
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.
In the following data, find the values of p and q. Also, find the median class and modal class.
Class | Frequency (f) | Cumulative frequency (cf) |
100 – 200 | 11 | 11 |
200 – 300 | 12 | p |
300 – 400 | 10 | 33 |
400- 500 | Q | 46 |
500 – 600 | 20 | 66 |
600 – 700 | 14 | 80 |
Find the class marks of classes 10−25 and 35−55.
Explain the meaning of the following terms: True Class Limits
The times, in seconds, taken by 150 athletes to run a 110 m hurdle race are tabulated below:
Class | 13.8 – 14 | 14 – 14.2 | 14.2 – 14.4 | 14.4 – 14.6 | 14.6 – 14.8 | 14.8 – 15.0 |
Frequency | 2 | 4 | 5 | 71 | 48 | 20 |
The number of athletes who completed the race in less than 14.6 seconds is:
Can the experimental probability of an event be greater than 1? Justify your answer.
Find the range of given data: 46, 35, 78, 90, 20, 56, 45, 76.
The monthly pocket money of ten friends is given below:
โน 80, โน 65, โน 35, โน 65, โน 50, โน 30, โน 60, โน 35, โน 65, โน 30
What is the lowest pocket money?