Answer Happy

5. During a recent drought, a water utility in a certain town sampled 100 residential water bills and found that 73 of the residences had reduced their water consumption over that of the previous year. With what degree of confidence one can assert that the width of Cl is to be at most 0.11. (5 points) 6. Suppose that we want to investigate whether on average men earn more than $20 per week compare to the women in a certain industry. Sample data show that 45 men earn on average $585 per week with a standard deviation $21, while 40 women earn on average $532 per week with a standard deviation of $26. Using 0.012 level of significance what do you infer from the above data? (5 points)