The following data are from matched samples taken from two populations. population element 1 2 a. compute the difference value for each element (difference between element of population 1 and population 2 and enter negative values as negative numbers). element difference value b. compute (to 3 decimals). c. compute the standard deviation (to 3 decimals). d. what is the point estimate of the difference between the two population means (to 3 decimals)? e. provide a confidence interval for the difference between the two population means (to 3 decimals and enter negative values as negative numbers). ,