When using a t table, the degrees of freedom used for a t test ...

[V@ndy87]

When using a t table, the degrees of freedom used for a t test for independent means is
 
  A) the degrees of freedom for sample 1, divided by the sum of the degrees of freedom for both samples.
  B) the average of the degrees of freedom for the two samples.
  C) the sum of the two sample sizes, minus one.
  D) the sum of the degrees of freedom for the two samples.

Question 2

A 95 confidence interval is figured by finding
 
  A) theZ score for the bottom 5 of the distribution.
  B) theZ score for the upper 95 of the distribution.
  C) the cutoff points for the lower 2.5 and the upper 2.5 of the distribution.
  D) the cutoff points for the lower 5 and the upper 5 of the distribution.

[k.lashomb]

Answer to Question 1

Here to give you a feedback, your answer was right Awesome

Answer to Question 2

C

[V@ndy87]

Wow, this really help

[juliaf]

Great answer, keep it coming