Question 1

For the training and test sets separately, compute the summary statistics of the response variable LOV and the predictor variables Age, Wait_Time, Female, and Hypertension. Age was measured in years and Wait_Time was measured in minutes.

Training Set

	N	Mean	SD	Min	25%	50%	75%	Max
LOV	3,531	180.30	127.85	0	89	149	237	840
Age	3,531	39.71	23.91	1	21	37	58	92
Wait_Time	3,531	31.48	38.24	0	7	18	40	240
Female	3,531	0.56	0.50	0	0	1	1	1
Hypertension	3,531	0.27	0.45	0	0	0	1	1

Test Set

	N	Mean	SD	Min	25%	50%	75%	Max
LOV	3,532	180.49	128.42	0	90	151	237	835
Age	3,532	40.08	23.45	1	22	37	58	92
Wait_Time	3,532	32.09	39.08	0	8	18	40	240
Female	3,532	0.57	0.50	0	0	1	1	1
Hypertension	3,532	0.27	0.44	0	0	0	1	1

Comparing Means of the Training and Test Sets

	Mean_Training	Mean_Test	Difference	P_Value
LOV	180.30	180.49	-0.20	0.95
Age	39.71	40.08	-0.37	0.51
Wait_Time	31.48	32.09	-0.61	0.51
Female	0.56	0.57	-0.01	0.45
Hypertension	0.28	0.27	0.00	0.68

How do the summary statistics of these 5 variables in the training set compare to those in the test set?

Also complete the following statements and explain your answer:

"One quarter of all patients in the training set were at least ____ years old."

"One quarter of all patients in the test set waited at most ____ minutes."

"In the test set, the average length of visit was about ____ minutes ____ [shorter, longer] than the median length of visit." (Round to the nearest multiple of 5, e.g., 15, 20, 25, ... .)

Answer 1