Answer:
a. numerical characteristics of a population
Step-by-step explanation:
Parameters and Statistics
It's important to mention that there is a difference between parameters and statistics.
A statistic is a numerical value of a variable that is part of a sample of the population. We have for example the sample mean [tex]\bar X[/tex] or the sample standard deviation s as examples of statistics.
A parameter is a value who represent a numerical characteristic of a population. We have for example the population mean [tex]\mu[/tex] or the population standard deviation [tex]\sigma[/tex] as examples of parameters.
Based on this the best answer would be:
a. numerical characteristics of a population
