Use the magnitudes (Richter scale) of the 600 earthquakes listed in Data Set 21 Earthquakes in Appendix

Question:

Use the magnitudes (Richter scale) of the 600 earthquakes listed in Data Set 21 "Earthquakes" in Appendix B. In 1989, the San Francisco Bay Area was struck with an earthquake that measured 7.0 on the Richter scale. If we add that value of 7.0 to those listed in the data set, do the measures of variation change much?
Data Set 21
MAGNITUDE DEPTH
2.45 ........................0.7
3.62 ........................6.0
3.06 ........................7.0
3.30 ........................5.4
1.09 ........................0.5
Refer to the indicated data set in Appendix B. Use software or a calculator to find the range, variance, and standard deviation. Express answers using appropriate units, such as "minutes."