Question 4. 1'2 An environmentalist is investigating the possibility that oestrogenic chemicals are leading to a particular type of deformityr in a species of amphibians living in a lalte. The usual proportion of deformed animals living in unpolluted water is [1.5%. In a sample of Lilli] animals examined, 15 were found to have deformities. {i} Test whether this provides evidence of the presence of harmful chemicals in the Hm. [3 Following an extensive campaign to reduce these chemicals in the lake a further sample of EEG animals was examined and III) were found to have deformities. {ii} Test whether there has been a signicant reduction in the proportion of deformed animals in the lalte. [3] Home Question 4. 1'3 The total claim amounts {in Em} for home and car insurance over a year for similar sized companies are collected by an independent adviser: Home : 13.3 19.2 12.3I 15.3 12.6 for : 14.3 21.11 12.3 12.4 22.3 {i} Test whether the mean home and car claims are equal. State clearly your probability value. [5] It was subsequently discovered that the results were actually 5 consecutive years from the same company. {ii} Carry out an appropriate test of whether the mean home and car claims are equal. [3] [Total 3] Measuring GDP (6pts): A simple economy has four industries: . The agricultural industry sells $45 million in food products directly to households as well as $35 million to the steel industry, which turns the food into biofuel for their factories. . The iron mining industry produces iron, all of which is sold to the steel industry. Total sales to the steel industry are $200 million per year. . The coke industry produces coke which is combined with iron to make steel. Total sales to the steel industry are $45 million per year. . The steel industry processes the iron and coke together to make steel. The steel industry sells $300 million to the auto industry to make cars per year. Assume another $50 million is sold directly to consumers/households and companies to put up steel fencing around their properties. . The auto industry uses steel from the steel industry as well as other inputs (that it creates on its own) to sell $725 million in vehicles to the public. What is GDP