15 Finding z-score for a percentile#

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import numpy as np
import pandas as pd
from pandas import Series, DataFrame
import matplotlib.pyplot as plt
import seaborn as sns
from scipy import stats

khanacademy

scipy.stats.norm

Finding z-score for a percentile fig 1

print(stats.norm.cdf(1.959963984540054))

# Percent point function (inverse of cdf — percentiles)
print(stats.norm.ppf(0.975))

0.975
1.959963984540054

print(stats.norm.ppf(0.3, loc=80, scale=9))

75.28039538562763

# mu + z * sigma = x