Question

3.
Find arithmetic mean by direct method for the following set of data:
12, 14, 17, 20, 24, 29, 35, 45.
200, 225, 350, 375, 270, 320, 290.​

Answer 1

Step-by-step explanation:

Answer

 Class intervalMid value

  xi Frequency 

  fifixi cf  0−5035 2 50 2  50−10075 3 225 5  100−150125 5 625 10  150−200175 6 1050 16  200−250225 5 1127 21  250−300275 3 825 24  300−350325 1 325 25    ∑fi=25 ∑fixi=4225 ⇒  Mean=∑fi∑fixi=254225=169

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Answer 2

The Answer Is:

i) is 24.5

2) is 290