Video Transcript
This question asks us, And the following correlation coefficient indicates the strongest relationship between two variables. So we have it is negative 0.9, So we have negative .5 A positive .8 And a positive .25. So yes, that's what our strongest relationship is. It doesn't ask if it's positive or negative, just the strongest ones, and we know that a correlation coefficient can go from one, two negative one, so which everyone is going to be closest to a wine is going to be correct. So with that we can go with negative .9 is going to be our strongest, so a.
Correlations - Information and Exercises! [
Chapter Two]Before you begin the correlations exercises, here is a quick review:
Characteristics of Correlations
- Positive correlation - high variables of one variable are associated with high values of the other; low values of one variable are associated with low values of the other
- Negative correlation - high values of one variable are associated with low values of the other
- Uncorrelated - a correlation coefficient of zero would mean there is no relationship between the variables
- Possible range of correlation coefficients is -1 to +1
- -1 ==> a strong negative relationship
- +1 ==> indicated a strong positive relationship
- 0 ==> indicated no relationship
- The closer to either +1 or -1, the stronger the relationship
- The closer to 0, the weaker the relationship
Exercises
- -0.8
- +0.5
- +0.7
- -0.2
- -0.9
- +0.8
- -0.2
- +0.1
Answers
1. The strongest correlation is -0.8. Remember, the number indicates the strength of the relationship. The sign just indicated the direction. Sign does not indicate strength.
2. The weakest correlation is +0.1.
3. This is a negative correlation. As alcohol consumption increases, grade decreases. They each move in a different direction: as one goes up, the other goes down.
4. This is a positive correlation: both variables are moving in the same direction. As cholesterol consumption decreases, heart attacks decrease.
5. Positive correlation - they are both moving in the same direction. As years of marriage increase, opinion similarity also increases.
6. Trick question! Ha Ha! There is no relationship. [Sorry, had to thrown one in].
And remember: all this information is purely supplemental. It cannot replace coming to class, taking notes, and reading your text!!!!
Uh-Oh! That’s all you get for now.
We would love to personalise your learning journey. Sign Up to explore more.
Sign Up or Login
Skip for now
Uh-Oh! That’s all you get for now.
We would love to personalise your learning journey. Sign Up to explore more.
Sign Up or Login
Skip for now
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
No worries! We‘ve got your back. Try BYJU‘S free classes today!
No worries! We‘ve got your back. Try BYJU‘S free classes today!
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Solution
The correct option is B -0.86
The value of the correlation coefficient lies between -1 and 1. Values closer to 1, irrespective of sign, indicate a stronger relationship, while the sign indicates
the direction. From the given numbers, 0.86 is the closest number to 1 and hence has the strongest correlation.
Textbooks
Question Papers