A Vending Machine Company Wants to Limit the Variation in the Number

Essay

A vending machine company wants to limit the variation in the number of ounces of soda that their machine dispenses into each cup. Use the 0.01 level of significance to test the null hypothesis $\sigma=0.12$ ounces against the alternative hypothesis $\sigma>0.12$ ounces based on a random sample of size $n=15$ cups for which $s=0.18$ .