Error variability or individual differences can be found a. ...

[nenivikky]

Error variability or individual differences can be found
 
  a. within each condition.
  b. between the conditions.
  c. Both a and b are true.
  d. Neither a nor b is true.

Question 2

When all possible samples have been randomly selected from a single
  population, the standard deviation of the resulting distribution of means is
  called
 
  a. the true standard deviation of the sample's individual scores
  b. the true standard deviation of the population's individual scores
  c. the standard error of the mean
  d. sample variance plus error variance

[brittiany.barnes]

Answer to Question 1

c

Answer to Question 2

c

[nenivikky]

TYSM

[ghepp]

Excellent