1. Seitz's list of several hundred business-to-business customers continues to grow. Managers would like to know whether the average dollar amount of sales per transaction per customer has changed from last year to this year. Suppose company accountants sampled 2D customers randomly from last yea r's records and determined that the mean sales per customer was $2.3oo, with a standard deviation of $5D. They sampled 25 customers randomly from this year's les and determined that the mean sales per customer for this sample were $2,450, with a standard deviation of $54G. Analyze these data and summarize your ndings for managers. Explain how this information can be used by decision makers. Assume that sales per customer are normally distributed