Two separate samples are being used to estimate the difference ...

[tfester]

Two separate samples are being used to estimate the difference between population means for two treatment conditions. Which of the following would produce the widest confidence interval?
 
  A) n1 =n2 = 10 with a pooled variance of 10
  B) n1 =n2 = 10 with a pooled variance of 100
  C) n1 =n2 = 20 with a pooled variance of 10
  D) n1 =n2 = 20 with a pooled variance of 100

Question 2

A skewed distribution typically has ____ tail(s) and a normal distribution has ____ tail(s).
 
  A) 1; 1
  B) 1; 2
  C) 2,;1
  D) 2; 2

[jojobee318]

Answer to Question 1

B

Answer to Question 2

B