stat chapter 2

two classifications of (a)   data are primary and secondary data

data came from asking all the people in the

population

(a)  

when the data came from asking a

sample of people selected from a well-defined

population,\

(a)  

a method of collecting data where

there is direct human intervention on the conditions

that may affect the values of the variable of interest.

(a)  

variables in the study whose values are believed to have an effect

• explanatory variable/s

• response variable/s

• extraneous variable/s

• treatments or factor levels

variables in the study whose values affected by explanatory variables

• explanatory variable/s

• response variable/s

• extraneous variable/s

• treatments or factor levels

values or categories of the explanatory variable that are being

considered in the study

• explanatory variable/s

• response variable/s

• extraneous variable/s

• treatments or factor levels

variables that may have an effect on the response variable but

their effects are not of interest in the study

• explanatory variable/s

• response variable/s

• extraneous variable/s

• treatments or factor levels

method of collecting data on the phenomenon of interest by recording the phenomenon as it actually happens.

(a)  

These are data generated by other agencies or organizations through the

process of registration, as required by some law, regulation or usual

custom.

(a)