The price of a set of ear buds at a national chain store is $180. A new statistics student decided to test the hypothesis
that you can buy that same set of ear buds online for less than you can buy it at the chain store. He decided
to test it at a level of significance of .05 since that level is the most common level. He looked up the price
of that ear buds on 10 different websites. Here are the prices that he found:
$ 165.00	$ 178.00	$ 179.00	$ 183.00	$ 159.00	$ 181.00	$ 184.00	$ 176.00	$ 163.00	$ 176.00

What is the null hypothesis? (Remember that the null hypothesis contains an equal sign.)
What is the alternative hypothesis?
What is the level of significance?
Which test do you perform? Student's t test or z test? Why?
How many degrees of freedom?
Which tail(s) are you testing and why?
What is the absolute value of the critical value ?