1. Departmental Store Agora claims that their mean weekly sales of Aerosol was at least 2,400 packages over the past 6 months and population distribution is unknown. The manager wants to check if the sales has increased in recent times. He obtained a random obtained sample of sales data from 61 stores and found that the sample mean is 3,593 packages with standard deviation 4919. At 8% significance level, using critical value approach see if the claim is true or not.