A sales manager is concerned about drop in sales in his store territory, between summer and the winter seasons. A sample of 40 stores was studied during summer and winter. During the summer months the mean sales was $1000 with standard deviation of $85. The mean sales during the winter months was $995 with a standard deviation of $100. At 0.02 significance level can we conclude there is a difference in sales between the two seasons? Find the p value