Statistics Calculator description

Basic statistics calculator with the following functions:
Descriptive statistics (median, quartiles, standard deviation, variance, coefficient of variation, standard error)
Linear Regression (Regression coefficient, regression equation)
Binomial (mathematical expectation, probability distribution, variance and deviation)
Poisson
Frequency distribution
T test - One Sample (H0, H1, Critical Region, Calculation of the test, Completion of the test, p-value)
T test - Two Samples
Chi-squared test
Normal distribution

Detail of all the formulas used in the calculator

Thanks to my brothers, Dhiego and Leandro, for their help in design and translating