Hypothesize why the data is linear at low voltages/currents, and then deviates at higher values. (hint: our eyes tell us that the light intensity is higher for these higher voltages/currents. assuming the temperature of the bulb filament corresponds to the light intensity, what can we say about the how the resistance of the filament changes with temperature? a simple qualitative answer is all that is sought here.)

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?