Question

Is 'p' a parameter or a statistic ? What about r? Explain your answer

Short answer

p is parametric correlation coefficient of population, r is statistic estimate from sample.

Step-by-step solution

Parameter and Statistic 

Parameter is a statistical measure of entire population, where population involves all the units of data.

Statistic is an estimate of population parameter, where sample involves only selected units (out of population) of data

Correlation Coefficients p and r

Variables are linearly correlated when they change at a constant rate, their relationship is denoted by a straight line graph.

pand rare statistical linear correlation coefficients

p(rho) is the Parameter - linear correlation coefficient, for entire population

r is the sample based 'statistic' estimate of - linear correlation coefficient r(rho)