Question 290
A Power BI team has selected this approach: Use STDEV.P or an equivalent population calculation over the correct numeric values. The original business context is: A distribution summary needs the population standard deviation of all included sensor measurements. Which check would show that the solution meets its stated goal?
Explanation
Correct Answer
The displayed dispersion agrees with a separate population-variance calculation. It provides the required observation for the chosen implementation: Use STDEV.P or an equivalent population calculation over the correct numeric values. This test addresses the stated business constraint directly.
Incorrect Answers
A table with two numeric amounts and one blank returns a count of two. That check would be meaningful for the separate case: An amount column has blanks and the team needs the number of numeric nonblank records. It would not directly verify this scenario's selected implementation: Use STDEV.P or an equivalent population calculation over the correct numeric values.
Three invoices from one customer count as one unique customer. That check would be meaningful for the separate case: A customer report needs the number of different customers in a filtered invoice set. It would not directly verify this scenario's selected implementation: Use STDEV.P or an equivalent population calculation over the correct numeric values.
Changing the category slicer does not change the measure but changing brand does. That check would be meaningful for the separate case: An order measure needs to ignore filters from a single ProductCategory field but still honor ProductBrand. It would not directly verify this scenario's selected implementation: Use STDEV.P or an equivalent population calculation over the correct numeric values.