What is the pooled estimate of the population variance? A) ...

[Cooldude101]

What is the pooled estimate of the population variance?
 
  A) (14/36)(6.5) + (22/36)(4.5) = 5.28
  B) (15/38)(6.5) + (23/38)(4.5) = 5.29
  C) (15/23)(6.5) + (23/15)(4.5) = 11.14
  D) (14/22)(6.5) + (22/14)(4.5) = 11.21

Question 2

If the standard deviation of the distribution of the difference between means is 0.76, what is the t score?
 
  A) (15  23) /0.76 = 10.53
  B) (0.76)(15  23) = 6.08
  C) (6.5 + 4.5)/20.76 = 4.18
  D) (55  51) /0.76 = 5.26

[jennafosdick]

Answer to Question 1

a

Answer to Question 2

D

[Cooldude101]

Gracias!

[scikid]

Excellent