Which of the following statements is incorrect?

Select one:

A Cronbach's alpha score of above 0.7 is considered to have acceptable reliability.

Cronbach's alpha can be understood as the average correlation coefficient for all of the possible split-half combinations that could theoretically be calculated.

Cronbach's alpha can be calculated to assess the reliability of a questionnaire.

Cronbach's alpha uses the split half method to assess the validity of a measure.