13.) I noticed that the prices of avocados increased lately. A few weeks ago the price for one regular avocado was, on average, $0.89. Below are prices (in $) for one avocado at several randomly selected supermarkets: 1.20 1.10 0.99 1.12 1.50 1.29 1.39 0.98 At o=0.05, are the average process actually higher now? Test using a: a.) hypothesis test b.) confidence interval13a.)Ho= P-value: Conclusion: 13b.)ta/2= CI: Conclusion