Statistical significance is more important than visual significance in interpreting single-system ...

Statistical significance is more important than visual significance in interpreting single-system design data.
 
  Indicate whether the statement is true or false

---

It is appropriate to use the independent-samples t-Test when:
 
  a. We want to compare the means of pairs of individuals who have been matched because they are similar to each other.
  b. We want to compare the means of two independent groups.
  c. We want to compare a sample statistic to a population statistic.
  d. We want to compare the means of more than two groups.

---

When we have a large number of possible independent variables that we want to explore, and we want to find a smaller set of these variables to use in predicting the dependent variable, eliminating other variables that add only an insignificant or trivial amount of explained variation in the dependent variable beyond the smaller set, we should use the hierarchical multiple regression method.
 
  Indicate whether the statement is true or false