Question Completion Status: Sigma xbar 1: Suppose that a normal population has a standard deviation of 5. 15. If a sample of size 49 were taken, what would be the value of the standard deviation of the sampling distribution of the sample mean? Round to three decimal places QUESTION 6 2 points Save Answer Sigma xbar 2: Suppose that a normal population has a standard deviation of 4.75. If a sample of size 44 were taken, what would be the value of the standard deviation of the sampling distribution of the sample mean? Round to three decimal places QUESTION 7 2 points Save Answer Ch7 inverse norm 8: The population of American IQ scores are normally distributed with a mean of 104 and a standard deviation of 12. If a random sample of 403 American IQ scores are selected, what sample average score would be the 5th percentile for all such sample averages? Round to the nearest tenth. Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save All Answers Save and Submit