How do you calculate ERA, slugging percentage? What are saber-metrics?

Question

1. How do you calculate ERA, what is the formula?
2. How do calculate slugging pct, what is the formula?
3. What is saber-metrics? (detail please)

Answer 1

ERA == (ER * 9) / (IP), conventionally to two decimals.

SLG == (hits + doubles + 2*triples + 3*homers) / at-bats, conventionally to three decimals.

SABR, the Society for American Baseball Research ( http://www.sabr.org/ ), is a collective of die-hard baseball nerds who are always pursuing greater insight into the great game. (If you've ever heard of Bill James, he's unoffically considered the godfather of sabermetrics, if not the living rock star as well.) "Sabermetrics" the word is a melange, playing off the pronounced acroynm along with the area of most intensive study -- delving ever deeper into the stats to find out what we can learn about what shows baseball greatness and what are the keys to winning. The history of baseball provides us with this huge, vast sandpile of fun stuff called stats, and there are infinite ways in which these numbers can be massaged and crunched and mined and sifted. And that lets us reach supportable conclusions; as one example, we know that on-base percentage and slugging average correlate better to run-scoring than does batting average; and run-scoring (more being better) correlates to winning, so high-OBP and high-SLG guys will tend to do more for winning games than high-AVG guys will. It can get quite complex -- think of it as "drinking the ocean" -- but it can also be entertaining and insightful, and when we do find supportable conclusions, we can use them to form winning roster-building strategies (in fantasy baseball if one participates, in the real world if one is an actual team general manager). Answers are never absolute and without exceptions, but the indicative trends hold true. And we'll never know everything.

Answer 2

Correct. When a player is walked, hit by a pitch or hits a sacrifice, those do not count as an at bat, and therefore would not be counted in slugging percentage calculation at all. If a player goes up to bat 4 times, and is walked once, and gets a hit once, he would be 1 for 3. Bases/official at bats.

Answer 3

Slugging percentage is Total Bases / At Bats.

Answer 4

Take the total number of earned runs times 9. Then divide that number by the innings pitched. = ERA

Answer 5

ERA = earned runs / innings pitcherd *9

SLG = total bases / ab bats

Sabremetrics. SABRE is the Society for American Baseball REsearch. Sabemetrics is the study and development of baseball stats.

The links below will help you.

Answer 6

ERA is Runs per nine innings

Slugging is bases per at bat