The logistics company wants to know if the time it takes toreceive shipments is the same or different for two shippingcompanies. A random sample of delivery times is selected for eachof the two shipping firms.
The null and alternative hypotheses are:
?0:(?1−?2)=0
??:(?1−?2)≠0
A 0.10 significance level is chosen for this two-tailedtest.
The samples are selected, and the results are:
?1 = 14.8 ????  ?1 = 4.6 ?????1 = 35
?2 = 17.4 ????  ?2 = 4.9 ?????2 = 47
