Suppose that 14 children, who were learning to ride two-wheel bikes, were surveyed to determine how long they had to use training wheels. It was revealed that they used them an average of eleven months with a sample standard deviation of five months. Assume that the underlying population distribution is normal. + Part (a) + Part (b) + Part (c) + Part (d) Part (e) Construct a 99% confidence interval for the population mean length of time using training wheels. (i) State the confidence interval. (Round your answers to two decimal places.) (ii) Sketch the graph. (Round your answers to two decimal places. Enter your a/2 to three decimal places.) CL = 0.99 NR = 0.005 = 0.005 11 (iii) Calculate the error bound. (Round your answer to two decimal places.)