Current Attempt in Progress

According to Chebyshev's theorem, at least what proportion of the data will be within $+-k$ for each value of $k?$

a$.k=2($Round your answer to $2$ decimal places.$)$

b$.k=2\mathrm{.}5($Round your answer to $2$ decimal places.$)$

c$.k=1\mathrm{.}8($Round your answer to $3$ decimal places.$)$

d$.k=3\mathrm{.}4($Round your answer to $3$ decimal places.$)$