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Visual Displays: Histogram Census v. Sample and Population Distribution v. Sampling Distribution Statistic v. Parameter Descriptive Statistics Center: Mean Median Mode Dispersion: Range, Interquartile Range Standard Deviation (Variance) (Standard Error) Chebyshevâ€™s Theorem Skewness Standardized Values Practice: Female Executives in U.S. companies earn an average salary of $80,000. The median salary for the same group is $90,000. The standard deviation of female U.S. executive salaries is $18,000. For comparison, the table below gives the salaries for a random sample of male executives in U.S. companies. Compare and contrast the salaries of male Executive Salary in and female executives. Comment on the Thousands claim that women are paid 75 percent of 1 90 what men earn in equivalent positions. 2 160 Assuming any executive is underpaid if he 3 40 or she earns less than $50,000, which 4 240 gender is more likely to be underpaid? 5 100 Explain your answers. Write your answers 6 120 in the form of a short newspaper article 7 100 (headline and all). 8 70 9 80 10 100 Practice We here at DOIT sports equipment company have been trying to upgrade our line of golf balls. The old balls which were moderately successful for us had the following characteristics: Average distance per drive of 265 yards with a standard deviation of 30 yards. Median drive of 263 yards. We tested 10 new balls driving them the following distances: ball distance 1 265 2 270 Compare and contrast the new and old 3 255 designs. Which ball is more likely to 4 230 reach beyond 290 yards? Which ball 5 250 is less likely to fall under 220 yards? 6 260 Design an advertisement (slogan/ 7 220 phrase and text) for the new ball that 8 298 emphasizes its strengths. 9 270 10 290 Practice We here at DOIT sports equipment company pride ourselves on providing a line of golf balls that consistently meet our customerâ€™s expectations. As such we continually test batches from each production run to make sure our balls meet the specifications. The test involves hitting a sample of 10 balls from each batch with a mechanized driver. The table below shows the average distance in the last 10 samples. (using the new ball design) sample distance 1 257.90 2 251.06 Compare and contrast this 3 261.71 information with that from the 4 previous question. What would 268.94 constitute evidence of a production 5 268.39 problem? 6 272.13 7 244.71 8 258.36 9 267.67 10 252.39

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