Multiple choices 39/50
Answer (Choose 1 answer)
A B Construct a 90% confidence interval for the population mean. Assume the population has a normal distribution. A sample of 15 randomly selected students has a grade point average of 2.86 with a standard deviation of 0.78.
C A. (2.37. 3.56)
B. None of the other choices is correct
C. (2.28, 3.66)
D. (2.41, 3.42)
Ε. (2.51, 3.21)
Let 0.05.14 1.76, 20.05 = 1.645
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