A sample of 16 observations has mean 105 and standard deviation 10. Testing H0: μ = 100, what is the value of t?
Correct answer B. 2.0
Explanation
t = (x̄ − μ) / (s/√n) = (105 − 100) / (10/4) = 5 / 2.5 = 2.0, with 15 degrees of freedom.
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