1. The times, in seconds, taken by 150 atheletes to run a 110 m hurdle race are tabulated below:
2. The abscissa of the point of intersection of the less than type and of the more than type cumulative frequency curves of a grouped data gives its
3. Mean of n numbers x1, x2, … xn is m. If xn is replaced by x, then new mean is
4. While computing mean of grouped data, we assume that the frequencies are [NCERT Exemplar Problems]
5. Mean of 100 items is 4 It was discovered that three items which should have been 60, 70, 80 were wrongly read as 40, 20, 50 respectively. The correct mean is
6. The times, in seconds, taken by 150 atheletes to run a 100 m hurdle race are tabulated below:
7. For the following distribution
8. In the given data:
9. For the following distribution
10. For the following distribution