想搵一個識STAT既人教我幾題數..

1. a fast food outlet claims that the mean waiting time in line is less then 4.5 minutes. a random sample of 60 custioners has a mean of 4.4 minutes with a standard deviation of 0.6 minutes. at the 5% significance level, test the fast food outlet's claim.

population: customers
variable: wait time in line
H0: M=4.5
H1"M<4.5
H0(in word): the mean waiting time in line of customers is 4.5
test statistic (4.4-4.5)/(0.6/sqr60)=-1.291
p-calue: 0.01<p-value<0.05
initial conclusion: reject

想問問我上面做得岩唔岩..
同埋想問多個問題..
>>make 98% confidence interval for the mean wait time.(係relate上一題)