Bach Photographs is a photography business with studios in two locations. The owner is interested in monitoring business activity closely at the two locations. Among the factors in which he is interested is whether the mean customer orders per day for the two locations are the same. A random sample of 11 days’ orders for the two locations showed the following data:

Location A Location B

$444 $478 $501 $233 $127 $230

$200 400 350 299 250 300

$167 250 300 800 340 400

$300 600 780 370 The owner wishes to know the difference between the average amounts in customer orders per day for the two locations. He has no idea what this difference might be. What procedure would you use under these circumstances? Explain your reasoning.