Q 75. - The Practice of Statistics for AP

Question

Baseball players (Introduction) Here is a small part of a data set that describes Major League Baseball players as of opening day of the 2009 season: 

(a) What individuals does this data set describe?

(b) In addition to the player’s name, how many variables does the data set contain? Which of these variables are categorical and which are quantitative?

(c) What do you think are the units of measurement for each of the quantitative variables?

Step-by-Step Solution

Answer

Part (a) Players are the individuals that are described in the data set.

Part (b) 

Age	Years
Height	Inches or Centimeters
Weight	Kilograms or Pounds
Salary	Dollars

Part (a) Step 1: Given information

Given data : 

Players	Team	Position	Age	Height	Weight	Salary
Rodriguez Alex	Yankees	Infielder	33	6-3	230	33,000,000
Ramirez Manny	Dodgers	Outfielders	36	6-0	200	23,854,494
Santana Johan	Mets	Pitcher	30	6-0	210	18,876,139
Zambrano Carlos	Cubs	Pitcher	27	6-5	255	18,750,000
Suzuki Ichiro	Mariners	Outfielders	35	5-11	170	18,000,000

Part (a) Step 2: Concept

Quantitative variables are measurements that are made up of numerical values.

Part (a) Step 3: Explanation

Individuals described in the data collection that describes major league baseball players as of the 2009 season's opening day are referred to as players.

Part (b) Step 1: Explanation

The units of measurement of each quantitative variable are: 

Age	Years
Height	Inches or Centimeters
Weight	Kilograms or pounds
Salary	Dollars