Answer:
Test value = 3.49
Step-by-step explanation:
We are given the following in the question:
Alpha, α = 0.05
First, we design the null and the alternate hypothesis
We use F-test to determine the difference in variation between the two samples.
Formula:
Putting all the values, we have
Now,
Comparison:
We reject the null hypothesis and accept the alternate hypothesis.
Thus, there is variation in advertising cost of salon and the advertising cost of nails.