a.
Comparison of GPA for randomly chosen college juniors and seniors:
xbar1= 3.05, s1 = .20, n1 = 15, xbar2= 3.25, s2 = .30, n2 = 15, ? = .025, left-tailed test.
b.
Comparison of average commute miles for randomly chosen students at two community colleges:
xbar1= 15, s1 = 5, n1 = 22, xbar2= 18, s2 = 7, n2 = 19, ? = .05, two-tailed test.
c.
Comparison of credits at time of graduation for randomly chosen accounting and economics students:
xbar1= 139, s1 = 2.8, n1 = 12, xbar2= 137, s2 = 2.7, n2 = 17, ? = .05, right-tailed test.
Do a two-sample test for equality of means assuming unequal variances.
For A,B, and C find:
d.f.
Standard Error
t-calc
p-value
t-crit
Comparison of GPA for randomly chosen college juniors and seniors:
xbar1= 3.05, s1 = .20, n1 = 15, xbar2= 3.25, s2 = .30, n2 = 15, ? = .025, left-tailed test.
b.
Comparison of average commute miles for randomly chosen students at two community colleges:
xbar1= 15, s1 = 5, n1 = 22, xbar2= 18, s2 = 7, n2 = 19, ? = .05, two-tailed test.
c.
Comparison of credits at time of graduation for randomly chosen accounting and economics students:
xbar1= 139, s1 = 2.8, n1 = 12, xbar2= 137, s2 = 2.7, n2 = 17, ? = .05, right-tailed test.
Do a two-sample test for equality of means assuming unequal variances.
For A,B, and C find:
d.f.
Standard Error
t-calc
p-value
t-crit