Elias.T HW1 - ELIAS TSIHLIS INTRO TO STATISTICS 3.8....

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ELIAS TSIHLIS INTRO TO STATISTICS 3.8. Following are the speeds at which 20 cars were timed on the highway in late-evening traffic: 77,69,82,76,69,71,80,66,70,77,72,73,80,86,74,77,69,89,74,and 75. (a) find the mean of these speeds. 77+69+82+76+69+71+80+66+70+77+72+73+80+86+74+77+69+89+74+75 = 20 1506/20= 75.3 (b) Find the mean of these speeds after subtracting 75 from each value and then adding 75 to the result. What general simplification does this suggest for the calculation of means? 2+6+7+1+6+4+5+9+5+2+3+2+5+11+1+2+6+14+1+0=92 92+75= 167 states that by subtracting 75 from each value and then adding 75 to the results leads the out come being more then the first out come. 3.10. The cargo bay of an airplane is designed to care a maximum lod of 15,000 pounds. If its loaded with 214 crates weighing on the average 65 pounds, is there any real danger of the cargo bay being overloaded? 214 x 64= 13696 3.20. An instructer counts the final examination in a course four times as much as each of the three one hour examinations. Which of two students has
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Elias.T HW1 - ELIAS TSIHLIS INTRO TO STATISTICS 3.8....

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