Unformatted text preview: Written Lesson for April Last year’s mean = 2700 miles
n = 150
Sd = 850 miles
α = 0.05 Solutions:
Null Hypothesis: mu < 2700 (mu = mean,) Alternative Hypothesis: mu >= 2700 Part-2 The probability of a type I error is the level of significance of the test of hypothesis, and is denoted by α = 0.05 Part-3 Error in writing text.
Approx. 0.03363 Rounded off to 0.03
Similarly, use n = 100 instead of 150
Z = (2573-2700)/85 Z = -1.49411765 (approx)
Area under the tail = 0.067572
(Using Z - probability table)
Power = 1 - B
= 1-0.06572 = 0.93 (approx)
Power of the second test is less than the first. ...
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- Spring '16