Q1. A shift manager in a restaurant heard that people pay moretips for dinner in compare to when they order lunch. She took 10samples for both day and night time in her restaurant and measuredhow much people have paid for tip.Day ($): 5 2 6 7 2 5 3 8 4 9Night ($): 7 6 8 5 9 11 8 3 6 10With 99% confidence, can you conclude that the amount of dinner tipis higher than lunch?Q2. How do people change their driving behavior after a large increase in the price of gasoline? To help answer the question, the speeds of cars were recorded as they passed a gas station. The speeds (km/hr) were recorded in the same location after the price of gasoline had risen by 15 cents. (Keller)Speeds Before Price Increase69 5850484558435856485158Speeds After Price Increase51 5358505146456242485148With 5% significance level, can we conclude that the speeds differ?