Question

Consider the accompanying data on breaking load (kg/25 mm width) for various fabrics in both an unabraded condition and an abraded condition. Use the paired t test to test H₀: μ_D = 0 versus H_a: μ_D > 0 at significance level 0.01. (Use μ_D = μ_U − μ_A.)

Fabric
	1	2	3	4	5	6	7	8
U	36.3	55.0	51.5	38.8	43.2	48.8	25.6	49.7
A	28.5	20.0	46.0	34.0	36.5	52.5	26.5	46.5

Calculate the test statistic and determine the P-value. (Round your test statistic to two decimal places and your P-value to three decimal places.)

t	=
P-value	=

Answer 1