The mean of 36 reading scores drawn from a population with a standard deviation of 8.4 is 25. Therefore, the 95% confidence interval around m is ______.
a. [1.95, 48.05]
b. [21.71, 28.29]
c. [22.26, 27.74]
d. [–2.66, 52.66]
Ans: C
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