Chapter 13.2, Problem 24E

To determine

a.

To find:

The mean clotting time for $f\left(t\right)=\frac{1}{\left(\ln 20\right)t}\text{ for }t\text{ in }\left[1,20\right]$.

To determine

b.

To find:

The standard deviation for $f\left(t\right)=\frac{1}{\left(\ln 20\right)t}\text{ for }t\text{ in }\left[1,20\right]$.

To determine

c.

To find:

The probability that a person’s blood clotting time is within 1 standard deviation of the mean for $f\left(t\right)=\frac{1}{\left(\ln 20\right)t}\text{ for }t\text{ in }\left[1,20\right]$.

To determine

d.

To find:

The median clotting time for $f\left(t\right)=\frac{1}{\left(\ln 20\right)t}\text{ for }t\text{ in }\left[1,20\right]$.