Practical - 2
Test for difference between proportions using Python
1. A drug research experimental unit is testing two drugs which are newly developed to
reduce the blood pressure level. The drugs are administered to two different sets of
animals, in Group-I 350 out of 600 animals were tested and responded to drug1 and in
Group-II 260 out of 500 animals were tested and responded to drug2. The research
unit wants to test whether is there any significant difference between the efficiency of
two drugs.
Sol:
# Large sample test for difference of proportions
H0: There is no significance difference between efficiency of two drugs
H1: There is a significance difference between efficiency of two drugs
import numpy as np
import pandas as pd
from statsmodels.stats.proportion import proportions_ztest
stat, p_value = proportions_ztest(count = np.array([350, 260]), nobs = np.array([600, 500]), alternative = 'two-sided')
stat, p_value
if p_value > 0.01:
print("Accept H0")
else:
print("Reject H0")