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 6.1-in and a standard deviation of 1.2-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?

Enter your answers as numbers. Your answers should be accurate to 2 decimal places.