summary statistics and probability refresherand python practice types of data numerical data discrete data continuous data categorical data ordinal data meanmedianand mode mean median the factor of outliers mode using meanmedianand mode in python calculating mean using the numpy package visualizing data using matplotlib calculating median using the numpy package analyzing the effect of outliers calculating mode using the scipy package some exercises standard deviation and variance variance measuring variance standard deviation identifying outliers with standard deviation population variance versus sample variance the mathematical explanation analyzing standard deviation and variance on histogram using python to compute standard deviation and variance try it yourself probability density function and probability mass function the probability density function and probability mass functions probability density functions probability mass functions types of data distributions uniform distribution normal or gaussian distribution the exponential probability distribution or power law binomial probability mass function poisson probability mass function ii