8. Assume the GPA of Stats II students is distributed normally with a population standard deviation...
8. Assume the GPA of Stats II students is distributed normally with a population standard deviation of .10. To test whether the average GPA of Stats II students is GREATER THAN 3.12, a sample of size 49 was drawn and a sample mean of 3.16 was calculated. What is the test statistic?
Select one:
a. z = 2.10
b. z = 2.80
c. t = 2.10
d. z= 2.57
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8. Assume the GPA of Stats II students is distributed normally
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Assume that z-scores are normally distributed with a mean of O and a standard deviation of 1. If P(z > d) = 0.9861, find d. d (Round to two decimal places.)
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