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Questions › UoH › UoH 2020 › Q29
1 mark, −0.33Statistics › Joint distributions, covariance and correlation › The correlation coefficientModerateabout 1 min

UoH 2020 Question 29: Joint distributions, covariance and correlation

Daily peak temperature for two summer months is recorded in units of degree Fahrenheit (F) for a study of impact of daily temperature on electricity consumption (E), measured in thousand units. It is found that between the two variables F and E, there is a positive correlation, rrr. If it is required that temperature measurements be converted to degree Celsius (C), then the value of correlation between temperature, C and electricity consumption, E:

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Daily peak temperature for two summer months is recorded in units of degree Fahrenheit (F) for a study of impact of daily temperature on electricity consumption (E), measured in thousand units. It is found that between the two variables F and E, there is a positive correlation, r. If it is required that temperature measurements be converted to degree Celsius (C), then the value of correlation between temperature, C and electricity consumption, E: (A) increases upon change of scale (B) decreases but remains positive (C) decreases and becomes negative (D) remains the same

Joint distributions, covariance and correlation has come up 61 times in 7 exams since 2005.

What this question tests

This question is on The correlation coefficient, part of Joint distributions, covariance and correlation in Statistics.

The standardised measure of linear association and what it can and cannot show.

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