GPA: The mean GPA at a certain university is 3.45 . Following are GPAs for a random sample of 20 business students from this university. 2.25 2.14 2.54 2.74 3.65 3.05 3.14 3.02 3.25 3.69 3.58 3.14 3.84 3.51 2.44 2.15 2.33 3.65 2.58 3.54 part 3: Compute the test statistic. Always round z -score values to at least two decimal places. =z
Added by Elizabeth P.
Step 1
First, we need to find the sample mean (x̄) and sample standard deviation (s) of the given GPAs. x̄ = (2.25 + 2.14 + 2.54 + 2.74 + 3.65 + 3.05 + 3.14 + 3.02 + 3.25 + 3.69 + 3.58 + 3.14 + 3.84 + 3.51 + 2.44 + 2.15 + 2.33 + 3.65 + 2.58 + 3.54) / 20 x̄ ≈ 3.01 s = Show more…
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