OPRE 201 WB1 – Homework 2

Please answer the following questions giving all details.1. The bar chart, pie chart, and the Pareto diagram for the estimated green power sales byrenewable energy source in 2008 are given below. Based on this information, what conclusionscan you reach about the sources of green power?Bar ChartWindUnreportedecruoSSolarLandfill mass and biomassHydroGeothermal0102030405060Pie Chart Geothermal3%Hydro11%Landfill massand biomass28%Wind55%Solar0%Unreported3%Pareto DiagramdtopernUmrhtoeGlasmlifdnaLsamoibordyHraloS100%90%80%70%60%50%40%30%20%10%0%Wdni60%50%40%30%20%10%0%SourceSource: National Renewable Energy Laboratory, 2008.2. The following data gives the price (in dollars) of a product from different online vendors:170 74 94 124 162 94 80 60 151 57 57 88 141 90 81a. Place the data into an ordered array.b. Construct a stem- and- leaf display.c. Around what value, if any, is the price concentrated? Explain.3. Solve the following problem by doing hand calculations. Please do not use Excel or any othercomputer software.The following data represents the overall miles per gallon (MPG) of mid-sized sedans.27 31 36 28 34 27 29 32 32 24a. Compute the mean, median, first quartile, and third quartile.b. Compute the variance, standard deviation, range, interquartile range, coefficient of variation,and Z scores.c. Are the data skewed? If so, how?d. Based on the results of (a) through (c), what conclusions can you reach concerning the milesper gallon of mid-sized sedans?Notes:- Homework 2 is due by midnight Saturday, February 16th.- Please include all details and steps performed to find your answers. Just writing the finalanswers will not get you full credit.

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