Day Self-Service Checkout Sales Employee Operated Checkout Sales 01/07/2024 33,850.88 37,736.00 02/07/2024 40,683.92 29,732.59 03/07/2024 31,235.50 36,840.21 04/07/2024 29,547.21 46,599.68 05/07/2024 25,302.74 50,854.96 06/07/2024 31,745.49 36,572.47 Using the above data calculate mean, variance, observation, pooled variance, degrees of freedom, standard deviation, Hypothesized Mean Difference, P(T<=t) one-tail, t Critical one-tail, P(T<=t) two-tail, t Critical two-tail