At one college, GPAs are normally distributed with a mean of 3.1 and a standard deviation of 0.4. According to the empirical rule, about what percentage of students at the college have a GPA between 2.3 and 3.9?
Added by Concepci-N W.
Step 1
3 and 3.9 using the formula Z = (X - μ) / σ, where X is the GPA, μ is the mean (3.1), and σ is the standard deviation (0.4). For GPA 2.3: Z = (2.3 - 3.1) / 0.4 = -2 For GPA 3.9: Z = (3.9 - 3.1) / 0.4 = 2 Show more…
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