CODEWITHSUNDEEP
pythonscipy.stats
MVKXXX
MVKXXX

Reputation: 375

How to find percentage of values above the second standard deviation in python?

Problem statement - Suppose a variable X has a bell-shaped distribution with a mean of 150 and a standard deviation of 20. a. What percentage of X values lies above 190?

My code so far:

import numpy as np
import math
import scipy.stats

X=scipy.stats.norm(150,20)

I know that 68% of X lie within 1 standard deviation ie (between 130 to 170) and 95% within 2 standard deviation (110 to 190).

But how to find percentage of values above 190? (I wrote 2.50 as the answer but it was incorrect)

Upvotes: 3

Views: 2775

Answers (1)

Stephan Kulla
Stephan Kulla

Reputation: 5067

Use sf() (see section "methods" at https://docs.scipy.org/doc/scipy/reference/generated/scipy.stats.norm.html):

import scipy.stats

scipy.stats.norm(150, 20).sf(190) # result: 0.022750131948179195

Upvotes: 3

Related Questions