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Find the z-score corresponding to the given area. Remember z is distributed as the standard normal...

Find the z-score corresponding to the given area. Remember z is distributed as the standard normal distribution with mean of μ=0 and standard deviation σ=1. Use the TI83, show all steps.

  1. The area to the left of z is 18%
  1. The area to the right of z is 70%

The mean starting salary for teachers is $67,000 with a standard deviation of $10,333. Assume that the starting salary is normally distributed. Show all steps using the TI83.

a. Find the probability that a starting teacher will make more than $85,000.

b. What salary do 20% of all teachers make more than?

.

Math   Statistics-And-Probability   
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