Jak używać funkcji VARPA w Excelu

Polskie Angielski
WARIANCJA.POPUL.A VARPA

The VARPA function in Excel and WARIANCJA.POPUL.A in Google Sheets are used to calculate variance across an entire population. These functions assume that the dataset represents the whole population and not just a sample from it. Below is a detailed guide on these functions, their applications, and practical examples.

Syntax and Examples

The syntax for the VARPA function in Excel and WARIANCJA.POPUL.A function in Google Sheets is as follows:

VARPA(value1, [value2], ...)
WARIANCJA.POPUL.A(value1, [value2], ...)

Here, value1, value2, ... represent the set of values for which the population variance is being calculated. The functions accept numbers, arrays of numbers, or cell references containing numbers.

Practical Application – Example 1

Suppose we have math test scores for a class of 30 students and we want to calculate the variance of these scores to understand how much the scores vary from the average.

Here are the hypothetical student scores:

68, 75, 81, 89, 93, 75, 83, 86, 95, 72, 69, 74, 91, 88, 82, 80, 77, 84, 90, 92, 70, 79, 85, 94, 67, 76, 87, 71, 73, 78

To calculate the population variance of these scores in Excel, input the data into cells A1:A30 and use the formula:

=VARPA(A1:A30)

In Google Sheets, similarly:

=WARIANCJA.POPUL.A(A1:A30)

The output shows the variance of the test scores, giving insight into how much the students” scores differ from the mean.

Practical Application – Example 2

Suppose you run a small store and want to analyze the monthly sales of 5 products over the past 12 months. The variance of these sales will help understand which products have the most stable sales.

Here are the sales data for each product over each month (in units):

[120, 135, 150, 145, 130, 120, 135, 150, 145, 140, 150, 125], [100, 105, 110, 100, 95, 90, 105, 115, 100, 95, 110, 105], [200, 210, 215, 210, 205, 200, 215, 210, 205, 200, 215, 210], [140, 135, 130, 125, 120, 115, 130, 135, 125, 120, 135, 140], [110, 105, 115, 120, 105, 110, 105, 115, 120, 110, 105, 100]

The formula in Excel for the first product would be:

=VARPA(B1:M1)

In Google Sheets, similarly:

=WARIANCJA.POPUL.A(B1:M1)

Repeat the calculations for each row where the sales data for a given product is stored. Comparing the calculated variances will indicate which product experiences the greatest sales fluctuations.

Więcej informacji: https://support.microsoft.com/pl-pl/office/wariancja-popul-a-funkcja-59a62635-4e89-4fad-88ac-ce4dc0513b96

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