Question

find the mean of the following data​

Answer 1

Answer: 69.429

Step-by-step explanation:

First calculate the halfway values in the C.I. Section. The results are 50,60,70,80 and 90. Multiply the number in the corresponding row. So 50*3, 60*10 ... i.e.

The results of the multiplication will be 150, 600, 770, 640 and 270.

Add them together and it makes 2430(call it a)

Now add the totals of the values of each C.I. Which is 3+10+11+8+3 = 35 (call it b)

Now do a/b. The answer is 69.429(3dp)