SOLUTION: The average annual salary for all the US teachers is $47,750. Assume that the distribution is normal and the standard deviation is $5680. Find that probability that a randomly sele

Algebra ->  Probability-and-statistics -> SOLUTION: The average annual salary for all the US teachers is $47,750. Assume that the distribution is normal and the standard deviation is $5680. Find that probability that a randomly sele      Log On


   

Question 1182324: The average annual salary for all the US teachers is $47,750. Assume that the distribution is normal and the standard deviation is $5680. Find that probability that a randomly selected teacher earns between $35,000 and $45,000 a year.''.
Answer by Boreal(15235) About Me  (Show Source):
You can put this solution on YOUR website!
z=(x-mean)/sd
so z=(35000-47750)/5680=-2.24
and (45000-47750)/5680=-0.48
this probability is 0.3031. exact is 0.3017 when z is not rounded 2ndVARS2normalcdf(35000,35000,47750,5680)ENTER