How to do this hypothesis testing question?
A courier service advertises that its average delivery time is less than 6 hours for local deliveries. A random sample of times for 12 deliveries to an address across town was recorded. These data are shown here. Is this sufficient evidence to support the courier’s advertisement, at the 5% level of significance?
3.03 6.33 6.50 5.22 3.56 6.76 7.98 4.82 7.96 4.54 5.09 6.46
((My calculation: sample mean=5.6875 and sample standard deviation =1.580368916 ))
A courier service advertises that its average delivery time is less than
3.03 6.33 6.50 5.22 3.56 6.76 7.98 4.82 7.96 4.54 5.09 6.46
((My calculation: sample mean
1 Answer
Dec 2, 2017
There is not sufficient evidence to support the advertisement at
Explanation:
Screenshot of my word file