LilyFlower8651 LilyFlower8651
  • 23-10-2017
  • Mathematics
contestada

Find the 80th percentile of the distribution of the average of 49 fly balls.

Respuesta :

meerkat18
meerkat18 meerkat18
  • 02-11-2017

Here we need to find 80th percentile for average of 49 fly balls

i.e. P(Z<z)=0.80

i.e. 0.5+P(0<Z<z)=0.80

P(0<Z<z)=0.8-0.8=0.3

Using standard normal table we get z=0.8415

Now z=xbar-mean/se=0.8415

So xbar=0.8415*7.14+250=256.00831

Hence 80th percentile is 256

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