Helena is comparing two sets of data. neither set is symmetrical. which measures of center and variability would be most effective to use when making comparisons between the two data sets?
a. mean and mad
b. mean and iqr
c. median and mad
d. median and iqr

One of every 20 customers reports poor customer service on your company’s customer satisfaction survey. you have just created a new process that should cut the number of poor customer service complaints in half. what percentage of customers would you expect to report poor service after this process is implemented? 1.) 5% 2.) 10% 3.) 2% 4.) 2.5%