Mathematics, 07.03.2020 04:35 lovelife132015
A researcher collects a simple random sample of grade-point averages of statistics students, and she calculates the mean of this sample. Under what conditions can that sample mean be treated as a value from a population having a normal distribution?
a. The sample has more than 30 grade-point averages.
b. If the population of grade-point averages has a normal distribution c. The researcher collects more than 30 samples.
d. If the population of statistics students has a normal distribution.
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A researcher collects a simple random sample of grade-point averages of statistics students, and she...
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