Question 932762
Ho: u < 8 (claim)
.........
&#945; = 0.01 , z-crtical = -2.3563
.......
sample of 20 waiting times has a sample mean of 6.5 minutes with a sample standard deviation of 2.1 minutes
test stat: z(6.5) = -1.5/(2.1/sqrt(20)) = -3.194
p-value = P(z < -3.194) = .007
.007 < .01
reject claim