The 50 companies percentages of revenues spent on R&D are repeated in Table 2.6. We have previously
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The 50 companies’ percentages of revenues spent on R&D are repeated in Table 2.6. We have previously shown (see Figure 2.21) that the mean and standard deviation of these data (rounded) are 8.49 and 1.98, respectively. Calculate the fraction of these measurements that lie within the intervals x̄ ± s, x̄ ± 2s, and x̄ ± 3s and compare the results with those predicted by Rules 2.1 and 2.2.
Data from figure 2.21
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Statistics For Business And Economics
ISBN: 9781292227085
13th Global Edition
Authors: Terry Sincich James Mcclave, P. George Benson
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