From a sample with

n equals

40,

the mean duration of a geyser's eruptions is

3.83

minutes and the standard deviation is

0.73

minutes. Using Chebychev's Theorem, determine at least how many of the eruptions lasted between

2.37

and

5.29

minutes.

At least

nothing

of the eruptions lasted between

2.37 and

5.29

minutes.

(Simplify your answer.)