Sample SAS Assignment

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Physics Sample SAS Assignment

BaSAS program:

data problem3;
input carnbr garage1 garage2;
diff=garage1-garage2;
cards;

1 8.6 9.3
2 11.2 11.1
3 10.5 10.4
4 2.3 3.5
5 4.0 4.7
6 7.3 7.8
7 6.3 6.9
8 7.2 7.3
9 3.2 4.0
10 5.8 6.2
;
proc print ;
title 'garage paired t comparison';
run;
proc univariate;
var diff;
run;

Question:

(c) Compare the results labeled “garage independent two-sample t test,” which reanalyzes the
garage data as though there were two independent sets of cars rather than the same cars
evaluated by the two garages, with what you found in

Answer: Null hypothesis (H₀): There is no significant difference between two garages regarding to
the cost

Alternate hypothesis (H₁): There is a significant difference between two garages regarding to
the cost

From the given data n₁=10 and sample mean=4.524
n₂=10 and sample mean=5.251

garage independent two-sample t test:

The TTEST Procedure

Statistics

Variable	garnbr	N	Lower CL Mean	Mean	Upper CL Mean	Lower CL Std Dev	Std Dev	Upper CL Std Dev	Std Err
estimate	1	10	4.524	6.64	8.756	2.0346	2.9579	5.4	0.9354
estimate	2	10	5.251	7.12	8.989	1.7971	2.6127	4.7698	0.8262
estimate	diff(1-2)	-3.102	-0.48	2.142	2.1087	2.7907	4.1269	1.248	0.1191