Following is the monthly income of eight families in a locality. Monthly income : 70,10,500,75,13,250,8,42 find out arithmetic mean using short cut method.

average = sum of observations ÷ no of observations
average = 968÷8 = 121
  • -11
Shortcut method splution

  • -6
Calculate median from the Following data
  • 3
Answer: The arithmetic mean is 121. Explanation: The total numbers of families (N) is 8. The assumed average (A) here is 75, which lies in the middle of the distribution. The total monthly income of all the families is = 70 + 10 + 500 + 75 + 13 + 250 + 8 + 42 = 968 The arithmetic mean through the direct mean =   = = 121 The summation of deviation (D) from assumed mean = -5 + (-65) + 425 + 0 + (-62) + 175 + -67 + -33 = 368 The arithmetic mean through direct method is = A + = 75 + = 75 + 46 = 121 Read more on Brainly.in 54793#readmore

  • -1
Page no 156 Question no 156
  • -2
What are you looking for?