(Solved): Please help me with these, I'm on a time crunch. THANK YOU !! According to a poll, 73% of Califor ...

Please help me with these, I'm on a time crunch. THANK YOU !!

According to a poll, 73% of California adults (369 out of 506 surveyed) feel that education is one of the top issues facing California. We wish to construct a 90% confidence interval for the true proportion of California adults who feel that education is one of the top issues facing California. Find a 90% confidence interval for the population proportion. (Round your answers to three decimal places.) I A quality control specialist for a restaurant chain takes a random sample of size 12 to check the amount of soda served in the 16 oz. serving size. The sample mean is 13.30 with a sample standard deviation of 1.56. Assume the underlying population is normally distributed. We wish to construct a 95% confidence interval for the true population mean for the amount of soda served. What is the error bound? (Round your answer to two decimal places.) 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 ten months with a sample standard deviation of three months. Assume that the underlying population distribution is normal. Part (a) Part (b) Part (c) Part (d) Part (0) 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.) 7.93 X 12.07 x ) (ii) Sketch the graph. (Round your answers to two decimal places. Enter your a/2 to three decimal places.) CL = 0.99 ( 2 0.005 = 0.005 ? 10 (iii) Calculate the error bound. (Round your answer to two decimal places.) X A hospital is trying to cut down on emergency room wait times. It is interested in the amount of time patients must wait before being called back to be examined. An investigation committee randomly surveyed 70 patients. The sample mean was 1.5 hours with a sample standard deviation of 0.5 hours. Which distribution should you use for this problem? (Enter your answer in the form z or tdf where df is the degrees of freedom.) Z