Statistics is a measure taken from the sample to help us analyze the data. The parameter is the measure taken from the population. In inferential statistics, we will use statistics to make inferences about the parameters. But let’s not jump in there and focus on summary statistics. Mean, median, standard deviation, IQR, range, all are summary statistics for a quantitative variable. The mean median, quartiles, and percentiles measure the center and position for quantitative data, whereas the range IQR, and standard deviation measure the variability for quantitative data. The summary measures change if we convert them to different units.