vickyy2
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Suppose a normal distribution has a mean of 79 and a standard deviation of 7. What is P(x< or = to 72)?

Respuesta :

Answer:

P( Z <= -1) = 0.1587

Step-by-step explanation:

ok, mean u = 79

s = 7

find  P( x <=  72)

P( (x - 79)/7  <=   (72 - 79)/7 )  = ?

P( Z <= -1) = 0.1587   from Z-scores table