the mean of a distribution is 145 and the standard deviation is 25. using chebyshev’s theorem:

Question

At least what percentage of the values will fall between 185 and 205?

At least what percentage of the values will fall between 110 and 125?

Answer 1

 

 

 

           Mean=145

           SDIEV = 25

           What percent will fall between 185 and 205?

 

           What percent will fall between 110 and 125?

 

            Of (185-205)  = 205 -185= 20;    20/25   =8/10. 4/5, .80, 80%

 

            of (110-125) = 125 - 110 =15;   15/25 =3/5,  .60, 60%