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. Table 2.6 R&D Percentages for 50 Companies 13.5 7.2 9.7 11.3 8.0 9.5 7.1 7.5 5.6 7.4 8.2 9.0 7.2 10.1 10.5

Data from figure 2.21Descriptive statistics (Quantitative data): Statistic Nbr. of observations Minimum Maximum Range 1st Quartile

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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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