Question

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 7.1-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 __. If you were to draw samples of size 50 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 . Enter your answers as numbers. Your answers should be accurate to 2 decimal places.

          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 7.1-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 ____.
If you were to draw samples of size 50 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 . Enter
your answers as numbers. Your answers should be accurate to 2
decimal places.

Added by Jose Maria E.

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