Our first function is g(x). <em>Al had two dozen donuts </em>means that <em>two dozen</em> is the y-intercept of this function. A dozen equals 12, therefore two dozens is 24. <em>Every cubicle he passed, he lost 2 donuts </em>is the slope of the function and it is negative, that is -2, thus:
The second equation is h(x):
So:
From the graph, we can see that the f(x) intersects the y-axis at:
Accordingly, h(x) has the lowest y intercept.
<em>In conclusion, the right answer is c.h(x)</em>
When the variance of a sample of 144 observation is 576 then, the standard deviation of the sample equals 24
The variance is a measure of variability. It is calculated by taking the average of squared deviations from the mean. Variance tells you the degree of spread in your data set
Standard deviation is a statistic that measures the dispersion of a dataset relative to its mean and is calculated as the square root of the variance.
Given,
The number of samples = 144
The variance = 576
The standard deviation is the square root of variance
The standard deviation = =24
Hence, when the variance of a sample of 144 observation is 576 then, the standard deviation of the sample equals 24
Learn more about Standard deviation here
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