Calculating Probability Using Calculator and/or Table

Question 1

Finding the Z-Score (with calculator)

Answer 1

invNorm(area, μ, σ) μ= Mean σ= Standard Deviation

Question 2

Finding the Probability Under a Normal Distribution (with calculator)

Answer 2

normalcdf(lower bound, upper bound, μ, σ)

Question 3

Finding the Probability Under a Normal Distribution (with table)

Answer 3

Question 4

Finding the Z-Score (with table)

Answer 4

Question 5

Practice Problem:

What is the probability that some event occurs with a z-score greater than 0.8 and less than -0.9?

Answer 5

0.3959