The image shows copper wire coiled around an iron nail and connected to a battery to create an electromagnet. which factors determine the strength of this electromagnet? a. the voltage of the battery and the size of the switch b. the number of coils of wire around the nail and the length of the wire in the circuit c. the size of the nail and the size of the switch. d. the amount of electric current and the number of wire coils around the nail

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?