Help please This Question: 1 pt 4 29 of 40 (37 OA 02257 OC. 09297 00....

Question

Question

Help please

Answer 1

Answer #1

Let X denotes the weight of a randomly selected college football player.

X ~ Normal(200, 50²)

Now,

The probability that he weighs between 170 and 220 pounds

P(170 X < 220

P(X < 220) - P(X < 170)

X-220 220-200 X-220 170-200 P( ) . P(-50 , 50 50 50

220 - 200 170 200 50 P(z 220

P(Z 0.4) - P(Z-0.6)

=Phi(0.4) - Phi(-0.6)

0.655422 -0.274253

0.381169

ans-> D) 0.3811

Answer 2

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