Random cause variation refers to variation n, the output of a ...

[MGLQZ]

Random cause variation refers to variation n, the output of a process that is unexpected and has an assignable cause.
  Indicate whether the statement is true or false

Question 2

The sampling distribution used to make inferences about a single population variance is:
 a. a normal distribution
  b. a t distribution
  c. an F distribution
  d. a chi-square distribution
  e. none of these

[mistyjohnson]

Answer to Question 1

F

Answer to Question 2

D