Sampling error is assumed a. only when the F ratio is ...

[craiczarry]

Sampling error is assumed
 
  a. only when the F ratio is calculated
  b. only when the t ratio is calculated
  c. only when the Pearson r is significant
  d. whenever samples are measured

Question 2

A researcher selects a pair of random samples. In Group 1 the scores are 25, 25, 24, 24, 23, 233, 22, 21, 20. In Group 2 the scores are 22, 20, 20, 18, 15, 15, 12, 12, 10.
 
  a. Find the t ratio
  b. Do you reject Ho?
  c. Do the two groups represent a single population?

[Ahnyah]

Answer to Question 1

d

Answer to Question 2

a t=4.608