6.2.1. State the rule that would be used to test the following hypotheses. Evaluate the appropriate test and state your conclusion.
(a) µ. = verstL-. H1:µ >120;"ji = 114.2, 11 =25, a = 18, a = 0.08
(b) versus H1: µ, ¢ 42.9; y = 45.1, n = 16, a = 32,a = O.Dl
(c) 14.2 versus H 1: µ, > 14.2; y = 15.8, n = 9, a =4.1, a = 0.13
experimenting with juices extracted from berries and roots that may have to affect the Stanford-Binet IQ scores of students afflicted with mild cases
....u.,u,,uu deficit (ADD). A random sample of 22 children diagnrned with
c.or101t1on have been drinking Brain-Blaster daily for two months. Past experience sueests that children with ADD score an average of 95 on the IQ test with a standard
of If the data are to be analyzed using the a = 0.06 level of significance,
what values would cause Ho lO be rejected? Assume that H1 is two-sided.
(a) fio: µ.. = µ.0 i.s rejected in favor of H1:µ, -;e µ,0 at the ct = 0.05 level of
"'W'""··-·Would Ho necessarily be rejected at the a = o.oi level of significance?
(b) Ho:µ.. = µ0 is rejected in favor of H1: µ * #La at the a = 0.01 level of
s1gwnuu:,1c:e.. Would Ho necessarily be rejected at the a = 0.05 Level of significance?
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