In: Statistics and Probability
The ages of adults who reside in a particular community have a mean of 35 years with a standard deviation of 5 years.
(a) According to Tchebysheff's rule, at least ___ proportion of adult residents have an age between 20 and 50 years.
(b) According to Tchebysheff's rule, at least ___ proportion of adult residents have an age between 25 and 45 years.
(c) According to Tchebysheff's rule, at least ___ proportion of adult residents have an age between 22.5 and 47.5 years.