Advertisements
Advertisements
प्रश्न
In the class intervals 10 – 20, 20 – 30, the number 20 is included in ______.
विकल्प
10 – 20
20 – 30
both the intervals
none of these intervals
उत्तर
In the class intervals 10 – 20, 20 – 30, the number 20 is included in 20 – 30.
Explanation:
Since, the class interval 10 – 20 is the first interval of frequency distribution and 20 – 30 is the next one but the number 20 is present in both intervals.
We know that, the presence of 20 in the interval 10 – 20 is not fully 100% while in the next interval 20 – 30, presence of it fully 100%.
APPEARS IN
संबंधित प्रश्न
Durations of sunshine (in hours) in Amritsar for first 10 days of August 1997 as reported by
the Meteorological Department are given below: 9.6, 5.2, 3.5, 1.5, 1.6, 2.4, 2.6, 8.4, 10.3, 10.9
(i) Find the mean 𝑋 ̅
(ii) Verify that = `sum _ ( i = 1)^10`(xi - x ) = 0
Find the values of n and X in each of the following cases :
(i) `sum _(i = 1)^n`(xi - 12) = - 10 `sum _(i = 1)^n`(xi - 3) = 62
(ii) `sum _(i = 1)^n` (xi - 10) = 30 `sum _(i = 6)^n` (xi - 6) = 150 .
If x is the mean of the ten natural numbers `x_1, x_2 , x_3+....... + x_10` show that (x1 -x) + (x2 - x) +.........+ (x10 - x)` = 0
Find the value of p for the following distribution whose mean is 16.6
| x: | 8 | 12 | 15 | p | 20 | 25 | 30 |
| f : | 12 | 16 | 20 | 24 | 16 | 8 | 4 |
If the ratio of mode and median of a certain data is 6 : 5, then find the ratio of its mean and median.
Mark the correct alternative in each of the following:
Which one of the following is not a measure of central value?
A grouped frequency table with class intervals of equal sizes using 250 – 270 (270 not included in this interval) as one of the class interval is constructed for the following data:
268, 220, 368, 258, 242, 310, 272, 342, 310, 290, 300, 320, 319, 304, 402, 318, 406, 292, 354, 278, 210, 240, 330, 316, 406, 215, 258, 236.
The frequency of the class 310 – 330 is:
If `barx_1, barx_2, barx_3, ..., barx_n` are the means of n groups with n1, n2, ..., nn number of observations respectively, then the mean `barx` of all the groups taken together is given by ______.
There are 50 numbers. Each number is subtracted from 53 and the mean of the numbers so obtained is found to be –3.5. The mean of the given numbers is ______.
The class marks of a continuous distribution are:
1.04, 1.14, 1.24, 1.34, 1.44, 1.54 and 1.64
Is it correct to say that the last interval will be 1.55 – 1.73? Justify your answer.
