Please answer questions 11-20 in an excel spreadsheet. If the answer does not match one of the options, then the answer is wrong. If the answer is wrong, explain why it is wrong. Please disregard the blue line at the bottom of some of the answer choices.

Please save answers in an Excel spreadsheet According to the Empirical Rule what percent of the population is within 2 standard deviations from the mean? Question 11 options: 5% 0.3% 95% 99.7% None of the answers match my calculation. 68% 32% Question 12 (6 points) According to the Empirical Rule what percent of the population is above 3 standard deviations above the mean, which 1s a right-tail probability? Question 12 options: 97.35% 2.5% 83.85% None of the answers match my calculation. 16% 81.5% 0.15% Question 13 (6 points) What is the Z score where 50.0% of the normal distribution 1s below that z score and 50.0% of the normal distribution lies above that same z score? Question 13 options: 0.67 1.64 1.28 0.39 None of the answers match my calculation. 0.00 2.33 Question 14 (6 points) The Z values of the limits of the area covering the middle 33.0% of the area under the normal curve are plus and minus Question 14 options: 0.39 0.47 0.43 0.35 None of the answers match my calculation. 0.51 0.32 Question 15 (6 points) If the mean annual return for common stocks 1s 12.5% and the standard deviation 14.5%, what is the probability that the stock returns are between 12.5% and 18%? Question 15 options: 0% 15% None of the answers match my calculation. 40% 47% 53% 58% Question 16 (6 points) The distribution of a product is unimodal and roughly symmetric. The package is labeled 12 oz. If the standard deviation 1s 0.2 ounces, what should the process mean be if 4% of the product is underweight? Question 16 options: 10.41 15.35 11.38 None of the answers match my calculation. 12.35 14.38 13.41 Question 17 (6 points) If the mean annual return for a stock 1s 17%, what is the risk (standard deviation) you would take for a probability of 35% of a return being at least 25%? Question 17 options: 14% 6% None of the answers match my calculation. 21% 17% 8% 11% Question 18 (6 points) The Chunkiest cookie factory changed their manufacturing process. The inspectors sampled 60 10- oz packages with mean 9.90 oz and a standard deviation of 1.6 oz. The CEO asks what is the lower weight boundary of the middle 50% of package weights. Question 18 options: 14.69 11.69 10.64 13.16 None of the answers match my calculation. 9.87 8.82 Question 19 (6 points) If the sample standard deviation is 7.77, what would be the estimated standard error of sample means for sample size 30? Write the result with 2 decimal places. Your Answer: Question 20 (6 points) The sample proportion 1s 0.60. What 1s the estimated standard error of the sampling distribution of sample proportions for sample of size 25? Your Answer: Answe