A random sample of 81 female American college students were each issued a stopwatch and asked to
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a. What is the population of interest?
b. Draw a histogram of the floor-to-door variable using multiples of 10 for class midpoints. Describe the distribution. Does it appear to be approximately normal? Explain.
c. Redraw the histogram using multiples of 5 for class midpoints. Describe the visible patterns displayed by this second histogram that were not visible in the first one. Explain what causes this strange pattern.
d. Would you say the histogram suggests that the variable, amount of time, is approximately normally distributed? What evidence can you find to support your answer?
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