Chapter 1.5, Problem 20PPS

a

To determine

To calculate: ERA using given information.

Answer to Problem 20PPS

ERA $=2.612912$

Explanation of Solution

Given Information:

Number of earned runs $=27$ -(i)

Number of innings pitched $=93$ -(ii)

Formula Used:

ERA $=\frac{NumberofEarnedRuns}{NumberofInningsPitched÷9}$ -(iii)

Calculation:

Using (i) and (ii) in (iii),

ERA $=\frac{27}{93÷9}$

  $=\frac{27}{10.3333}$

  $\approx 2.612912$

Thus, ERA $=2.612912$

b

To determine

To evaluate: The effectiveness for modeling the given data.

Answer to Problem 20PPS

ERA is not so effective to compare pitchers.

Instead, FIP can be used which does not involve fielders.

Explanation of Solution

Given Information:

A data is given.

Summary:

A table showing ERAs of pitchers of various teams is given.

It can be seen for two pitchers, ERA is same. So it is not so effective to compare pitchers.

Instead, FIP can be used which does not involve fielders.