If a heat engine pulls 4390.0 j of heat from the hot reservoir and exhausts 3582.2 j of heat to the cold reservoir, what was the work done by the engine? what is the efficiency of this engine in percent? (do not enter the percent sign)

7. see worksheet 1 for values of variables x1, x2 and x3 and answer the following questions: a. for each variable find the mean, median, coefficient of skewness, range and population standard deviation. b. compared to variable x1, how are the mean and median affected by extreme values (outliers) seen in x2 and x3. c. is the median or mean the better measure of location for x2 and x3? explain. d. explain the differences in the magnitudes of the skewness coefficients for the three variables. e. what is the relationship between the range and standard deviation looking across the three variables?