Exercise 2 [31 marks: 4 + 3 + 9 +15} Maintaining swimming pools can be quite costly due to all the chlorine that is needed to keep the water clear and relatively free of germs. A chain of hotels (all with outdoor pools) seeking to reduce the costs decided to analyse the factors that determine how much chlorine is needed. They commissioned a chemist to conduct an analysis. It is believed that the speed at which chlorine in a pool is depleted, measured by the percentage of Chlorine depletion during an 3-hour day. depends on the temperature of the water (\"'21, higher temperature uses chlorine faster}; on the pH level, which is a measure of the acidity of the water {pH level ranges from CI to 14. at low levels the water is acidic at high levels it is alkaline. and levels around 15 use the least chlorine}; and on weather {sunshine uses up chlorine}. The chemist recorded chlorine deptetton, water temperature, pH level and weather (dened as 1 for mainly cloudy. 2 for partly sunny. and 3 for sunny} on 210 3-hour days under varying conditions of pH level, water temperature and weather conditions. These data are saved in the a3e2.xl'sx le. (a) For each of the four variables, answer the following questions. Is it qualitative or quantitative? If it is qualitative, is it ranked or unranked? If it is quantitative, is it discrete or continuous? What is its level of measurement? Explain your answers