A company has historically averaged 50 days on the collection of its account receivables. To improve cash flow, the AR manager was presented with an incentive bonus if she could reduce the average collection time." A random sample of 16 account receivables showed a mean collection of 41 days and a standard deviation of 12 days. Assume the collection times are approximately normally distributed. Is there enough evidence to conclude that the average collection time has been reduced? Test the hypothesis at the 5% level of significance. Ho: population mean= days Which one is the correct statement for HA? population mean> 50 days population mean