In the article Comparing the lifetime of two brands of batteries (Journal of Statistics Education, Vol. 21,
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In the article "Comparing the lifetime of two brands of batteries" (Journal of Statistics Education, Vol. 21, No. 1, pp. 1-19) by P. Dunn, two brands of AA alkaline batteries were compared. The following table gives the number of pulses required for a sample of 18 Energizer and Ultracell batteries to reach a voltage level of 1.3.
a. Construct a stem-and-leaf diagram for these data with one line per stem.
b. Construct a stem-and-leaf diagram with two lines per stem.
c. Which stem-and-leaf diagram do you find more useful? Why?
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