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 23 4 8 910 11 12 A 20 35 34 23 47 35 30 13 39 39 35 13 B 42 48 28 47 51 17 22 26 43 48 38 17 (a) Choose the appropriate hypotheses. Assume /a is the diference in mean lengths of team A and team B. rule at the .10 level of significance.(Round your answers to 3 decimal places. A negative values should be indicated by a minus sign.) Reject the null hypothesis if the p-value is less than 0.10 or if tealc or tcalc (c) Find the test statistic (cal- (Round your answer to 3 decimal places. A negative value should be indicated by a minus sign.) calc (d) Find the p-value. (Round your answer to 3 decimal places. A negative value should be indicated by a minus sign.) p-value (e) Make a decision. We Do not reject the null hypothesis. (0) State your conclusion. We can conclude that the evaluator teams are consistent in their estimates 26 MacBook Pro

Answer 1

Column1	Column2	Column3
t-Test: Two-Sample Assuming Equal Variances
	a	b
Mean	30.25	35.5833333
Variance	115.2954545	163.901515
Observations	12	12
Pooled Variance	139.5984848
Hypothesized Mean Difference	0
df	22
t Stat	-1.105691576
P(T<=t) one-tail	0.140402671
t Critical one-tail	1.321236742
P(T<=t) two-tail	0.280805341
t Critical two-tail	1.717144374