Question 872533
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Hi

sample 25, mean = 19.2, sd = 4.27
Ho: x  &#8805;  21.1
Ha: x < 21.1 claim
t = (19.2 - 21.1)/(4.27/sqrt(25) = -1.9/.854 = -2.225
p-value(t < -2.225) (df = 24) = .0179
Reject Ho, The claim that x < 21.1 is valid  (.0179 < .05)