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(Choose 1 answer)
The grade point averages for 10 randomly selected high school
students are listed below, which implies a sample mean of 2.54 and a
sample standard deviation of 1.11. Assume the grade point averages
are normally distributed.
☐ A
2.0 3.2 1.8 2.9 0.9 4.0 3.3 2.9 3.6 0.8
Find a 98% confidence interval for the true mean.
☐ E
A. (0.67, 1.81)
B. None of the other choices is correct
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C. (2.12, 3.14)
D. (3.11, 4.35)
E. (1.55, 3.53)
Let 20.01 2.33, t0.01.9 = 2.82
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