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Tchebysheff's theorem?
A manufacturer wasnts to advertise a mileage interval that excludes no more than 10% of the milage on a tire. Mean mileage is 25,000, standard deviation is 4000. What interval should I suggest?
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- cidyahLv 710 years ago
mean+k sd = 25000+4000k
Mean -k sd = 25000-4000k
1/k^2 =.10
1/k^2=-0.10
k^2 =1/..1
k=3.1623
(see the link)
25000-4000(3.1623) = 12350.8
25000+4000(3.1623) = 37649.2
(12,350, 37,649)
Source(s): http://cnx.org/content/m13502/latest/
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