Question 6 (2.14 points) Listen How much does the average household spend on security systems? A random sample of 1000 households spent an average of $720 per month with a standard deviation of $280. Obtain the 95% confidence interval for the population mean. (685.25 , 754.75] 1718.04 . 721.96] [262.62, 297.38] (702.62, 737.38) Question 7 (2.16 points)