Assignment Part 1: T Test Using Formula:

A researcher is interested in whether union workers earned significantly higher wages than nonunion workers. She interviewed 12 union workers and 15 nonunion workers. Their hourly wages are shown below (X1 = hourly wages of union workers, X2 = hourly wages of nonunion workers). Test if the research hypothesis Ha (Union works earned significantly higher wages than nonunion workers) is true.

1. Fill out the table: F(X1), F(X1), F(X2), F(X2), SF(X1), SF(X1) ,SF(X2), andSF(X2) . (10 points)

Union Workers	Nonunion Workers
X1 (hourly wages $)	F (N of workers)	F(X1)	F(X1)	X2 (hourly wages $)	F (N of workers)	F(X2)	F(X2)
14	1			10	2
15	2			11	2
16	3			12	3
17	3			13	3
18	2			14	3
19	1			15	2
	N = 12	SF(X1)=	SF(X1) =		N = 15	SF(X2)=	SF(X2) =

1. Find the means (show your work):