Which of the following is an accurate interpretation of the properties of the outer core and mantle based on p-wave behavior? choose one: a. wave velocity is slower in the outer core than in the mantle. b. wave velocity is unrelated to the refraction of p-waves. c. one cannot make any interpretations about velocity without also knowing how s-waves behave. d. wave velocity is faster in the outer core than in the mantle.

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?