If the variance of a variable is ​100, what is the standard​ deviation?

Step-by-step explanation:

Standard Deviation-

Standard deviation is a measure of how spread out or dispersed the numbers are.

Variance-

Variance is the average of the squared differences from the mean.

Square root of variance is standard deviation.

As given, the variance of a variable is 169, hence its standard deviation will be,

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LammettHash

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Standard deviation is the square root of variance, so the std dev is .

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step-by-step explanation:

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

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this shows that   runner b is moving at a slower rate."