varPop

varPop

Calculates the population variance:

$$\frac{\Sigma{(x - \bar{x})^2}}{n}$$

Syntax

varPop(x)

Alias: VAR_POP.

Parameters

• x: Population of values to find the population variance of. (U)Int*, Float*, Decimal*.

Returned value

• Returns the population variance of x. Float64.

Example

Query:

DROP TABLE IF EXISTS test_data;
CREATE TABLE test_data
(
    x UInt8,
)
ENGINE = Memory;

INSERT INTO test_data VALUES (3), (3), (3), (4), (4), (5), (5), (7), (11), (15);

SELECT
    varPop(x) AS var_pop
FROM test_data;

Result:

┌─var_pop─┐
│    14.4 │
└─────────┘