A metric value, with an expected value and a variance; represents a count that may be either exact or estimated (for example, when sampled).
JSON representation | |
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{ "value": string, "variance": string } |
Fields | |
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value |
The expected value of the metric. |
variance |
The variance (for example, square of the standard deviation) of the metric value. If value is exact, variance is 0. Can be used to calculate margin of error as a percentage of value, using the following formula, where Z is the standard constant that depends on the preferred size of the confidence interval (for example, for 90% confidence interval, use Z = 1.645): marginOfError = 100 * Z * sqrt(variance) / value |