The mean of annual salaries of region 1 and region 2 more than $6000? A=.10

region 1	Reg 2
xbar1= 67,700	Xbar 2= $62,000
Sigma 1= $8925	Sigma 2= $9025
N1= 45	N2= 41

a)

Ho:

Ha:

b) determine critical value:

c) rejection region is:

d) calculate standardized test stat fir U1-u2

z=

e) reject or fail to reject ther is or is not enough evidence to support the claim