Question

Given data consists of distinct values of xi occurring with frequencies fi. The mean value for the data is

xi 5 6 8 10 fi 8 10 10 12

• A. 7
• B. 7.5
• C. 8
• D. 6

Answer 1

Answer:

B. 7.5

xi	fi	xifi
5	8	40
6	10	60
8	10	80
10	12	120
Total	40	300

Mean = ∑x_if_i /∑f_i

= 300/40

= 7.5