a = 1.95
b = 4.58
location = 2.28
scale = 411.99

import numpy as np
import scipy.stats as stats
import matplotlib.pyplot as plt

betaprime = stats.betaprime
a, b, loc, scale = 1.95, 4.58, 2.28, 411.99
size = 2782
y = betaprime.rvs(a, b, loc, scale, size=size)

param = betaprime.fit(Q1['OrderValue'], floc=0)
pdf_fitted = betaprime.pdf(Q1['OrderValue'], *param)
plt.plot(Q1['OrderValue'], pdf_fitted, color='b')

plt.hist(y)
plt.show()