maxefficacy2358 maxefficacy2358
  • 09-04-2024
  • Mathematics
contestada

The mean of 5 observations is 24/5 and variance is 194/25. If the mean of first four observations is 7/2 , then the variance of first four observations is
(1) 3/2
(2) 5/2
(3) 5/4
(4) 2/3

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