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9:%0;$.% <=4=4> ?)@"#% A0%B-%C;DE (%)CE F)0$)C;% )C& ?*)C&)0& G%2$)*$1C The following is a sample of prices, rounded to the nearest cent, charged per gallon of standard unleaded gasoline in the San Francisco Bay area in June 1997: 137, 139, 141, 137, 144, 141, 139, 137, 144, 141, 143, 143, 141. Represent these data in: A frequency table. !"#"
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9:%0;$.% <=4=6> ?)@"#% A0%B-%C;DE (%)CE F)0$)C;% )C& ?*)C&)0& G%2$)*$1C The following are the percentages of ash content in 12 samples of coal found in close proximity: 9.2, 14.1, 9.8, 12.4, 16.0, 12.6, 22.7, 18.9, 21.0, 14.5, 20.4, 16.9 Find the: Sample mean.
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9:%0;$.% <=4=5> ?)@"#% A0%B-%C;DE (%)CE F)0$)C;% )C& ?*)C&)0& G%2$)*$1C The following data represent the lifetimes (in hours) of a sample o f 40 transistors: 112, 121, 126, 108, 141, 104, 136, 134 121, 118, 143, 116, 108, 122, 127, 140 113, 117, 126, 130, 134, 120, 131, 133 118, 125, 151, 147, 137, 140, 132, 119 110, 124, 132, 152, 135, 130, 136, 128 Determine the sample mean, median, and mode.
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