Question 5

Engineers must consider the breadths of male heads when designing helmets. The company researchers have determined that the population of potential clientele have head breadths that are normally distributed with a mean of 7.1in and a standard deviation of 0.9 in. In what range would you expect to find the middle 50% of most head breadths? Between [:] and [:]. If you were to draw samples of size 49 from this population. in what range would you expect to find the middle 50% of most averages for the breadths of male heads in the sample? Between [:] and [:j. Enter your answers as numbers. Your answers should be accurate to 2 decimal places