The 160 heights of males from a data set of body measurements vary from a low of 160.0 cm to a high of 190.5 cm. Use the rand rule of thumb to estimate the standard deviation s and compare the result to the standard deviation of 7.16 cm calculated using the 160 heights. What does the result suggest about the accuracy of estimates of s found using the range rule of thumb? Assume the estimate is accurate if it is within 1.4 cm.

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