Telling time+Time zones

Today in class we really focused on standard deviation and why certain parts of the world wake up a different times. The answer is because the sun shines at different times on different parts of the world. Time zones are areas with an established standard time. Daylight Savings time is when the clocked gets pushed forward one hour in the spring to allow more sunlight in the afternoon. Standard deviation measures the absolute variability of a distribution. Geographers calculate standard deviation by, first, find the mean of the data then, subtract the ,Eans from each data point next, take each difference and square it finally, find the variance and calculate the square root of the variance. There are 24 zones !

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