ngineers 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...

ngineers 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 5.8-in and a standard deviation of 1.2-in.


In what range would you expect to find the middle 68% of most head breadths?
Between  and  inches.


If you were to draw samples of size 34 from this population, in what range would you expect to find the middle 68% of most averages for the breadths of male heads in the sample?
Between  and  inches.


Use 2 decimal places.