STAT200 Syracuse University Interpretation of probabilities Problems Paper
Question Description
Let’s say that the price for a monthly cell phone plan in the US follows a normal distribution with a mean of $62 with a standard deviation of $18. Calculate the z-score for the cost of your cell phone plan. Then write a few complete sentences to describe:
What proportion of cell phone plans are below your cost?
What proportion of cell phone plans are above your cost?
Is your cell phone plan considered unusually expensive or inexpensive? (Hint: find the middle 90% of observations)

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