problem 2: the following data represent the pain duration of the patients as follows:

duration of pain(minutes)	no. of patients
15-30	2
30-45	8
45-60	15
60-75	20
75-90	4

1. what will be mean of pain duration.

2. fins mode of daily pain duration and interpret your result

3. what will be appropriate measure of center value of daily pain duration and interpret your result?