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Paragraph : The number of telephone calls received in 245 successive one minute intervals at an exchange is given below in the following frequency distribution. array |l|l|l|l|l|l|l|l|l| array l Number of calls array & 0 & 1 & 2 & 3 & 4 & 5 & 6 & 7 Frequency & 14 & 21 & 25 & 43 & 51 & 40 & 39 & 12 array Question : What is the median of the distribution?

Options

  1. A3.5
  2. B4
  3. C4.5
  4. D5

Correct answer

B. 4

Step-by-step solution

array |c|c|c| x & f & c f 0 & 14 & 14 1 & 21 & 35 2 & 25 & 60 3 & 43 & 103 4 & 51 & 154 5 & 40 & 194 6 & 39 & 233 7 & 12 & 245 array Here n=245 which is odd number. Hence, median = ( n+1 2 ) th term = ( 246 2 ) th term =123 th term Hence, median =4 .

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