The marketing department has asked the accounting and finance department to assist them in estimating the average amount spent on retail purchases by customers using the stores VISA reward card. You are wanting to evaluate the situation prior to the upcoming meeting for you must make your decision. Thus ten randomly chosen credit card accounts are selected and yield the following average amount spent by the customer: $25, $68, $150, $78, $63, $18, $250, $45, $102, $78. How large a sample size is needed to be accurate within $25 on the amount spent on the VISA reward credit card using a 95% confidence interval.