many recent issues have you read?" Suppose the following frequency distribution Summarizes all 500 responses. Issues red Frequency 0 15 10 40 85 4 350 a. What is the arithmetic average number of recent issues that subscribers have read? b. What is the weighted average number of recent issues that subscribers have read? Use the frequency as weights. c. Why are both averages different? Which one would you choose? b. What is the standard deviation in the number of recent issues subscribers have read