1.2 The Department of Transportation in South Africa conducted a study a number of years ago that showed that the proportion of cars tested which failed to meet the state pollution standard was 37%. The department would like to be able to say that the cars have improved since then. In a sample of 100 cars more recently, the proportion not meeting the standards was 28%. Are the cars better at meeting the standards than they used to be? Clearly state the null and alternative hypotheses. Perform the hypothesis test at 99% confidence level and explain the meaning of your conclusion, [10] (