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Math · Statistics And Probability
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1. The hydrocarbon emissions at idling speed in parts per million (ppm) for automobile of 2000 and 2005 are given for 20 randomly selected cars. Adol Dele 2000 models: 320, 365, 206, 106, 216, 500, 645, 212, 324, 422, 325, 642, 424, 456, 435, 234, 354, 253, 211, 323 2005 models: 221, 235, 216, 206, 216, 250, 245, 232, 304, 322, 315, 342, 224, 226, 335, 334, 454, 223, 231, 203 a) Calculate summary statistics b) Construct histogram or stem-and-leaf or box-plot (select only 1 and explain why?) for the 2-year data Comment on what the plot indicates regarding whether or not the population emissions changed from 2000 to 2005. Use the concept of variability in your comments. c)

Could you please answer this question manually without using any software?
Thank you in advance..

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