A descriptive statistic is used to summarize the samples and measurement in order to examine the key features of the data. It include three main components:

• Distribution - Shows how often each value occurs in a dataset

• Central tendency - Describes the center point of data using the mean, median or mode

• Variability - Indicates how spread out the values are using standard deviation, variance, minimum and maximum values, kurtosis and skewness

A inferential statistic is used to predict and draw conclusion from a larger population based on sample data. Random sampling and unbiased procedures are crucial to ensure validity and generalizability of the findings from the sample to the population.