A company had been using a new Customer Relationship Management (CRM) system for the past 1 year to keep track of customers' details and buying preferences to conduct customer analytics and targeted sales campaigns. The sales manager claimed that the average sales of its customers had increased by more than $1,000 using the new system. To determine if the claim is true, the increase in sales of a random sample of customers was tracked and shown in a table in Appendix 1. Determine if the claim by the sales manager is true with a hypothesis test at 2.5% level of significance.