a)
H0 : mu=250
HA: mu not = 250
b)
z =(x - mu)/(s/sqrt(n))
= ( 251.6 - 250)/0.6423
= 2.49
c)
p value = 0.0127
as p value < 0.05 reject H0
also should i reject or not reject? ax *, * A. .A ... AaBbCcDc AabbCcDc AaBbci...
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