Given the following summary statistics for the mean calcium uptake for two methods, what would be the degrees of freedom for a two-sample
t test of
![](http://webquiz.ilrn.com/ilrn/formulaImage?f=5C3A5Cmu_7B17D+5C3A-+5C3A5Cmu_7B27D5C3A&ns=0)
if
![](http://webquiz.ilrn.com/ilrn/formulaImage?f=5C3A5Csigma_7B17D5C3A+3D+5C3A5Csigma_7B27D5C3A&ns=0)
?
a.
df = 8
b.
df = 7
c.
df = 5
d.
df = 9
Question 2 From the following
Minitab output, what can be concluded regarding the difference in the mean PO
2 levels for the two populations?
a.The control and treatment groups are not significantly different at the
![](http://webquiz.ilrn.com/ilrn/formulaImage?f=5C3A5Calpha+5C3A3D+5C3A0.055C3A&ns=0)
significance level.
b.The control and treatment groups are not significantly different at the
![](http://webquiz.ilrn.com/ilrn/formulaImage?f=5C3A5Calpha+5C3A3D+5C3A0.015C3A&ns=0)
significance level.
c.The mean of the control group is significantly higher than the mean of the treatment group at the
![](http://webquiz.ilrn.com/ilrn/formulaImage?f=5C3A5Calpha5C3A+3D+5C3A0.015C3A&ns=0)
significance level.
d.The mean of the control group is significantly lower than the mean of the treatment group at the
![](http://webquiz.ilrn.com/ilrn/formulaImage?f=5C3A5Calpha+5C3A3D+5C3A0.015C3A&ns=0)
significance level.