BUG: Describe is giving me different std.

[ninjakx]

• I have checked that this issue has not already been reported.

• I have confirmed this bug exists on the latest version of pandas.

• (optional) I have confirmed this bug exists on the master branch of pandas.

---

Pandas Version:
pandas==1.1.0

Data file: penguins1@csv

df.head(10).describe()

gives me:

std value for bill_length_mm is around 2

df.head(10)['bill_length_mm'].values
result in:
`array([39.1, 39.5, 40.3, nan, 36.7, 39.3, 38.9, 39.2, 34.1, 42. ])

import numpy as np
x = [39.1, 39.5, 40.3,  0, 36.7, 39.3, 38.9, 39.2, 34.1, 42. ]
np.std(x, ddof=1)

gives:

12.445923027240687

pd.Series(x).std() gives 12.445923027240687 (same)

but why describe is giving me 2??

`

[ninjakx]

When I have nan in x = [39.1, 39.5, 40.3, np.nan, 36.7, 39.3, 38.9, 39.2, 34.1, 42. ] then my series gives me 2.2357573909329043