Given information
The survey 100 families with children in the school. Three of the families spent $65, $75, and $95, respectively.
Now, to find the key terms which refer in the study.
Step-by-step explanation
The population is all the families spending on school uniforms.
The sample could be all families bought only summer uniforms. (although this sample may not represent the entire population).
The parameter is the average (mean) amount of money spent on school uniforms by families with children at Knoll Academy this term.
The statistic is the average (mean) amount of money spent by families with children in the sample.
The variable could be the amount of money spent by one family. Let X = the amount of money spent by one family.
The data are the dollar amounts spent by families with children in the school. Examples of the data are $65, $75, and $95.