Question: 33. The harmonic mean is often used as a measure of central tendency for data sets consisting of rates of change, such as speeds. It

33. The harmonic mean is often used as a measure of central tendency for data sets consisting of rates of change, such as speeds. It is found by dividing the number of values n by the sum of the reciprocals of all values, expressed as

(No value can be zero.) Four students drive from New York to Florida (1200 miles) at a speed of 40 mi h (yeah, right!). Because they need to make it to statistics class on time, they return at a speed of 60 mi h. What is their average speed for the round trip?

(The harmonic mean is used in averaging speeds.)

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