The time for a professor to grade a student's homework in statistics has a mean of 14 minutes and a standard deviation of 2 minutes. What is the probability that randomly selected homework will require 10 minutes or more to grade? Also what is the excel formula to the question.
Added by Jose Luis F.
Step 1
We need to find the z-score for 10 minutes using the formula: z = (x - μ) / σ where x is the value we want to find the probability for (10 minutes), μ is the mean (14 minutes), and σ is the standard deviation (2 minutes). z = (10 - 14) / 2 = -2 Show more…
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