Correlational Matrix/ Scales of Measurement

1. income and education

2. age and job satisfaction

1. 0.8. This means that people with higher education levels tend to have higher incomes.

2. shows that age is not a strong predictor of job satisfaction.

 executive function and episodic

0.75

verbally rude and impulsivity

0.25, postive correlation

verbally rude and conventional morality 

r = −0.52, negative correlation

Equal Interval

• When a scale has equal intervals, each unit or range of values is the same size, regardless of its position on the scale. 

• Example:

  A thermometer is a good example of an equal-interval scale. The difference between 30° and 40° is the same as the difference between 50° and 60

Properties, Mathmatecial Operations, Descriptive Statistics for the Scales of Measurement

approximate interval

an approximate interval usually refers to an interval estimate that gives a range of likely values for a population parameter (like a mean or proportion), based on sample data.

The most common kind is a confidence interval — for example:

“We are 95% confident the true mean lies between 10 and 14.”