The weight of high school football players is normally distributed with a mean of 195 pounds and a standard deviation of 20 pounds. What is the probability of a player weighing more than 238 pounds?

A. 0.0334
B. 0.0486
C. 0.0158
D. 0.9842

Answer :

Answer:

c)

The probability of a player weighing more than 238

P( X > 238) = 0.0174

Step-by-step explanation:

Step(i):-

Given mean of the normally distribution = 195 pounds

Given standard deviation of the normally distribution

= 20 pounds.

Let 'x' be the random variable of the normally distribution

Let X = 238

[tex]Z = \frac{x-mean}{S.D} = \frac{238-195}{20} = 2.15[/tex]

Step(ii):-

The probability of a player weighing more than 238

P( X > 238) = P( Z> 2.15)

= 1 - P( Z < 2.15)

= 1 - ( 0.5 + A(2.15)

= 1 - 0.5 - A(2.15)

= 0.5 - 0.4821 ( from normal table)

= 0.0174

The probability of a player weighing more than 238

P( X > 238) = 0.0174