An issue of USA TODAY discussed the amounts spent by teens and adults at shopping malls.
Suppose that we want to perform a hypothesis test to decide whether the mean amount spent by teens is less than the mean amount spent by adults.
a. Identify the variable.
b. Identify the two populations.
c. Determine the null and alternative hypotheses.
d. Classify the hypothesis test as two tailed, left tailed, or right tailed.