Question

Do people who spend more time on social networking sites spend more time using Twitter? Megan conducted a study and found that the correlation between the times spent on the two activities was 0.8. (a) What does this result say about the relationship between times spent on the two activities?

Answer 1

It states that time spent on social networking sites & twitter have a strong positive correlation.

Explanation:

Correlation is the statistical measure of co-movement relationship between two variables. Correlation Coefficient 'r' lies between -1 & +1

Correlation can be following on basis of variables relationship direction

• Positive Correlation : It means two variables move in the same direction - one variable increase, other variable increase & one variable decrease, other variable decrease. 'r' is positive.
• Negative Correlation : It means two variables move in opposite direction - one variable increase, other variable decrease & one variable decrease, other variable increase. 'r' is negative.

Correlation can be following on the basis of variables :

• Strong Correlation : It means the variables fluctuations are more inter-related. r > 0.5
• Weak Correlation : It means the variables fluctuations are less inter-related. r < 0.5

Correlation between times spent on social networking sites & twitter is 0.8 This r = 0.8 means that the two activities have strong positive correlation. It implies that increase in one lead to increase in other activity & vice versa, by a high magnitude.