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Elza [17]
3 years ago
6

The salaries of pharmacy techs are normally distributed with a mean of $32,000 and a standard deviation of $3,000. If a pharmacy

tech is selected at random, what is the probability they make more than $39,000?
Mathematics
1 answer:
Law Incorporation [45]3 years ago
5 0

Answer:

The probability is  P( X >  39000) =0.01

Step-by-step explanation:

From the question we are told that

   The mean is  \mu = \$ 32000

    The standard deviation is \sigma = \$ 3000

Generally the probability that they make more than $39,000 is mathematically represented as

         P( X >  39000) = P( \frac{X - \mu }{\sigma }  > \frac{39000 - 32000}{3000} )

 \frac{X -\mu}{\sigma }  =  Z (The  \ standardized \  value\  of  \ X )

          P( X >  39000) = P(Z > 2.33 )

From the z table  the area under the normal curve to the right corresponding to  2.33  is      

         P(Z > 2.33 ) = 0.01

So

         P( X >  39000) =0.01

     

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