Ch7 Norm Interval 2a: Suppose the heights of adult American males are normally distributed with a mean of 67.4 inches and a standard deviation of 4.35. What would be the upper boundary, in inches, of a symmetric, centered interval that contained all the sample averages (from samples of size 127) that are within 2.95 standard deviation units of the mean? Round to the nearest hundredth. QUESTION 7 CH7 Norm Interval 1:" BONUS: If a normal population has a mean of 16.5 and a standard deviation of 0.75, then what symmetric, centered data interval would contain 95% of all sample averages from samples of size 625? O a. 16.4412 to 16.5588 O b.-1.96 to 1.96 O c. 16.4507 to 16.5494 O d. 15.03 to 17.97 QUESTION 8