Question

Consider the following information.

Sample 1	19	10	10	14
Sample 2	15	15	6	11

Calculate the differences, d_i. (Use Sample 1 − Sample 2.)

Sample 1	19	10	10	14
Sample 2	15	15	6	11
di	=?	=?	=?	=?

Calculate the values for d and s_d. (Round your answer for s_d to three decimal places.)

d=

s_d=

Answer 1

Sample 1	19	10	10	14
Sample 2	15	15	6	11
di	19-15 = 4	10-15 = -5	10-6 = 4	14-11 = 3

Mean of Difference d = Σdi/n

d = (4+(-5)+4+3)/4

d =1.5

Standard deviation of difference calculation

Mean = 1.5

sd = 4.359