Question

find the mean of the following data by direct method.
class Interval
1-5
5-9
9-13
13-17
17-21
Frequency
4
3
5
7
1
n=20​

Answer 1

Thermodynamic equilibrium, condition or state of a thermodynamic system, the properties of which do not change with time and that can be changed to another condition only at the expense of effects on other systems.