Advertisements
Advertisements
प्रश्न
Obtain the mean of the following distribution:
| Frequency | Variable |
| 4 | 4 |
| 8 | 6 |
| 14 | 8 |
| 11 | 10 |
| 3 | 12 |
उत्तर
As we know that:
Mean of the data `(barx) = (sum_(i = 1)^n f_ix_i)/(sum_(i = 1)^n f_i)`
= `(4 xx 4 + 8 xx 6 + 14 xx 8 + 11 xx 10 + 3 xx 12)/(4 + 8 + 14 + 11 + 3)`
= `(16 + 48 + 112 + 110 + 36)/40`
= `322/40`
= 8.05
Hence, the mean of the given data set is 8.05.
APPEARS IN
संबंधित प्रश्न
Find the mean of 994, 996, 998, 1002 and 1000.
The mean of the following data is 20.6. Find the value of p.
| x : | 10 | 15 | p | 25 | 35 |
| f : | 3 | 10 | 25 | 7 | 5 |
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 |
Five coins were simultaneously tossed 1000 times and at each toss the number of heads wereobserved. The number of tosses during which 0, 1, 2, 3, 4 and 5 heads were obtained are shown in the table below. Find the mean number of heads per toss.
| No. of heads per toss | No.of tosses |
| 0 | 38 |
| 1 | 144 |
| 2 | 342 |
| 3 | 287 |
| 4 | 164 |
| 5 | 25 |
| TOtal | 1000 |
Find the median of the following data : 41, 43, 127, 99, 61, 92, 71, 58, 57 If 58 is replaced
by 85, what will be the new median.
The arithmetic mean and mode of a data are 24 and 12 respectively, then find the median of the data.
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:
A grouped frequency distribution table with classes of equal sizes using 63 – 72 (72 included) as one of the class is constructed for the following data:
30, 32, 45, 54, 74, 78, 108, 112, 66, 76, 88, 40, 14, 20, 15, 35, 44, 66, 75, 84, 95, 96, 102, 110, 88, 74, 112, 14, 34, 44.
The number of classes in the distribution will be:
The mean of 100 observations is 50. If one of the observations which was 50 is replaced by 150, the resulting mean will be ______.
The median of the data 78, 56, 22, 34, 45, 54, 39, 68, 54, 84 is ______.
