Five step approach to T test
A random sample of 15 observations
provided x-bar = 182 and s = 12.
(a) Test H0: μ = 190
versus H1: μ < 190 at α = .05. State your assumption about
the population distribution.
(b) What can you say about the
P-value of the test statistic calculated in part (a)?
A weight loss program advertises
“LOSE 40 POUNDS IN 4 MONTHS.” A random sample of n = 25 customers has
x-bar =32 pounds lost and s = 12. Test H0:μ = 40 against H1:μ
< 40 with α = .05.
ScholarMatic: Explanation & Answer
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