Code to support post on significance levels required for two sample z test of proportions.

twosampleprobability5.py

#Observe probability difference from 2% to 10%
p_diffs = [x*.01 for x in range(2,11)]

data = []
for p_diff in p_diffs:
    record = {}
    record['Probability Difference'] = p_diff * 100
    record['Sample Size to Detect Difference'] = sample_required(p1=.5,
                                                                p_diff=p_diff,
                                                                alpha=.05)
    record['Confidence Level'] = '95%'
    record['Initial probability'] = '50%'
    data.append(record)

for p_diff in p_diffs:
    record = {}
    record['Probability Difference'] = p_diff * 100
    record['Sample Size to Detect Difference'] = sample_required(p1=.5,
                                                                p_diff=p_diff,
                                                                alpha=.01)
    record['Confidence Level'] = '99%'
    record['Initial probability'] = '50%'
    data.append(record)

df = pd.DataFrame(data)