Reply With QuoteH0: mu = 90
H1: mu < 90
a: usually set at .05
RR: rejection region?
using the normal distribution, compute z = (x-mu)/(s/sqrt(n)) and compare it to the z score for an "a" or "alpha" of .05
z = (88-90)/(2.6/sqrt(64))
null and alternate hypotheses
His agent claims that the average speed of a fastball thrown by pitcher Moe M. Down is 90 mph. If the average speed of 64 randomly selected fastballs is 88 mph with a standard deviation of 2.6 mph, should we reject the agent's claim?
H0:
H1:
a:
RR:
H0: mu = 90
H1: mu < 90
a: usually set at .05
RR: rejection region?
using the normal distribution, compute z = (x-mu)/(s/sqrt(n)) and compare it to the z score for an "a" or "alpha" of .05
z = (88-90)/(2.6/sqrt(64))
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