A soft drink manufacturing and exporting companymarkets a new brand of soft drink with two experimental flavors. Flavor1 is sent to thirteenstores; the average sales in the first month is 45units witha sample standard deviation of 7units. Flavor2 is sent to tenstores; their average salesinthe firstmonth are38units with a sample standard deviation of 6units. Assume that the populations from which the samples aretaken follow normal distribution.