Which type of test should I run?
Identify the type of problem
2 Sample t-test
Write out the Research Hypothesis
The management of Discount Furniture designed an incentive plan for salespeople.
To evaluate this
innovative plan, 12 sales people were selected at random, and their weekly incomes before and after the
plan were recorded.
Has the incentive program made a difference in incomes?
The federal government recently granted funds for a special program designed to reduce crime in high-
Numbers of crimes by area were recorded for a one-month period before and after the
program was implemented for twenty different zip-codes.
Has there been a decrease in the number of
A coffee manufacturer is interested in whether the mean daily consumption of regular-coffee drinkers is
less than that of decaffeinated-coffee drinkers.
A random sample of 50 regular-coffee drinkers showed a