Suppose you work for a smoothie shop and you want to assess whether the
average transaction value at your shop is different from the competing
smoothie shop on the other block. To do so, you randomly sample 19 of your
shop's transactions and record a sample average of $9.75 and sample standard
deviation of $3.50. You then collect data on 15 randomly selected transactions
from the competing smoothie shop. This sample has a mean of $11.00 and a
standard deviation of $4.70.
What is the test statistic for the hypothesis test of whether there is a difference
in your shop's average transaction value minus the average transaction value of
the competing smoothie shop?
O -1.97
O 0.66
O -0.86
not enough information
