QUESTION 8 2 points Save Answe Ch7 Norm Interval 3a: Suppose the heights of adult American males are normally distributed with a mean of 67.1 inches and a standard deviation of 4.24. What would be the lower boundary, in inches, of a symmetric, centered interval that contained all the sample averages , from samples of size 69, that are within 2.95 standard deviation units of the mean? Round to the nearest hundredth. QUESTION 9 2 points Save Answer Sigma xbar 6: Suppose that a normal population of healthy adult human body temperatures has a standard deviation of 0.23. If a sample of size 169 were taken, what would be the value of the deviation of the xbar curve (sigma xbar)? Round to three decimal places Click Save and Submit to save and submit. Click Save All Answers to save all answers. Save All Answers Save and Submit