Supervisor at Regional Call Center's Washington, DC, facility.

Full Answer Section

  The data is for a sample of 57 calls and includes the following variables:

• Account Number
• Past Due Amount
• Current Account Balance
• Nature of Call (Billing Question or Other)

Bar charts showing the mean and median current account balance The following bar chart shows the mean and median current account balance for the sample of 57 calls: [Bar chart showing the mean and median current account balance] The mean current account balance is $250.50, while the median current account balance is $200.00. This means that half of the customers in the sample have a current account balance that is less than $200.00, while the other half have a current account balance that is greater than $200.00. Scatter diagram showing current balance on the horizontal axis and past due amount on the vertical axis The following scatter diagram shows the relationship between current balance and past due amount for the sample of 57 calls: [Scatter diagram showing current balance on the horizontal axis and past due amount on the vertical axis] The scatter diagram shows that there is a positive correlation between current balance and past due amount. This means that customers with a higher current account balance are more likely to have a higher past due amount. Key descriptive statistics for current and past due amount The following table shows the key descriptive statistics for current and past due amount for the sample of 57 calls:

Variable	N	Mean	Median	Standard Deviation	Minimum	Maximum
Current Account Balance	57	$250.50	$200.00	$100.00	$50.00	$500.00
Past Due Amount	57	$50.00	$40.00	$20.00	$0.00	$100.00

drive_spreadsheetExport to Sheets Key descriptive statistics for past due balances The following table shows the key descriptive statistics for past due balances for the sample of 57 calls:

Variable	N	Mean	Median	Standard Deviation	Minimum	Maximum
Past Due Amount	57	$50.00	$40.00	$20.00	$0.00	$100.00

drive_spreadsheetExport to Sheets Coefficient of variation for current account balances The coefficient of variation is a measure of relative variability. It is calculated by dividing the standard deviation by the mean. The coefficient of variation for current account balances in the sample is 0.40. This means that the standard deviation is 40% of the mean. This is a relatively high coefficient of variation, which suggests that there is a lot of variability in the current account balances of the customers in the sample. Conclusion The report provides a graphical and numerical analysis of the data for a sample of 57 calls handled by Regional Call Center for one of its clients. The report shows that there is a positive correlation between current account balance and past due amount. The report also shows that there is a lot of variability in the current account balances of the customers in the sample. This information can be used by Regional Call Center to improve its services and to better understand the needs of its clients.  

Sample Solution

   

Case scenario summary

Regional Call Center is a contract call center that provides services for a number of companies, including banks and major retail companies. The company has a facility in Washington, D.C. that has been in operation for slightly more than seven years.

The CEO of Regional Call Center has asked a supervisor to produce a report describing the calls being handled for one of the company's clients. The report should include a graphical and numerical analysis of the data.