Question

A cognitive retraining clinic assists outpatient victims of head injury, anoxia, or other conditions that result in cognitive impairment. Each incoming patient is evaluated to establish an appropriate treatment program and estimated length of stay. To see if the evaluation teams are consistent, 12 randomly chosen patients are separately evaluated by two expert teams (A and B) as shown.

Estimated Length of Stay in Weeks
Patient
Team	1	2	3	4	5	6	7	8	9	10	11	12
A	38	26	25	46	47	23	41	23	18	28	31	52
B	37	32	35	16	51	37	40	33	16	33	42	34

Find the test statistic t_calc. (Use Minitab. Round your answer to 4 decimal places. A negative value should be indicated by a minus sign.)

t_calc           

Find the p-value. (Use Minitab. Round your answer to 4 decimal places.)

p-value           

Answer 1

We use two sample t test in minitab to see if there is significant difference among the evaluation of the two expert teams.

Steps : stat, basic statistics, 2 sample t test.

in the above output we see that the value of the t statistic is

Tcal = - 0.15 and p-value is 0.878

Conclusion : as p-value is >0.05=alpha, we accept the null hypothesis and conclude there is significant difference among the evaluation of the two expert teams.