correlation analysis AYAD HABIB

What does correlation measure?

• The speed of an object

• The strength and direction of a relationship between two variables

• The size of an object

• The color of an object

If one variable increases while the other decreases, what type of correlation is this?

• Strong correlation

• No correlation

• Negative correlation

• Positive correlation

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What is the range of Pearson's correlation coefficient?

• 0 to 100

• -1 to 1

• 0 to 1

• -100 to 100

What is the purpose of partial correlation?

• To find the average of all variables

• To compare two unrelated variables

• To calculate the total number of variables

• To measure the effect of one variable while controlling for another