2. Researchers wanted to test if tips were worse when bad weather for the next day was forecasted on the restaurant receipt. The tips, in percents, for 20 such receipts were: 17.0 16.1 20.2 19.8 19.4 18.0 18.5 16.1 16.8 14.0 17.0 13.6 17.5 20.0 20.2 18.8 18.0 23.2 18.2 19.4 Is this evidence of a tip percentage below 20% when bad weather is fore- casted? Perform a hypothesis test. 3. Using the data in the problem above, find a 95% confidence interval for the average tip percent when bad weather is in the forecast