Asked by
Vrushali Kheur
on Oct 16, 2024
Verified
A science instructor assigns a group of students to investigate the relationship between the pH of the water of a river and its water's hardness (measured in grains) .Some students wrote these conclusions: "there was a very strong correlation of 0.902 grains between pH of the water and water's hardness." Is the calculation of the correlation appropriate?
A) No: there is little or no association.
B) Yes: the pH and the hardness of the water are data collected from the same river.
C) No: pH and hardness of water have different units.
D) Yes: correlation is less than 1.
E) No: correlation has no units.
Correlation
A statistical measure that describes the extent to which two variables change together, but not necessarily causally.
pH
A scale used to specify the acidity or basicity of an aqueous solution, with values ranging from 0 to 14.
Hardness
A measure of a material's resistance to deformation, indentation, or scratching.
- Recognize the importance of correlation in assessing the intensity and directionality of connections among variables.
- Interpret the meanings of correlation measures accurately, noting that they span from -1 to 1, and elucidate what these figures represent.
Verified Answer
RR
Learning Objectives
- Recognize the importance of correlation in assessing the intensity and directionality of connections among variables.
- Interpret the meanings of correlation measures accurately, noting that they span from -1 to 1, and elucidate what these figures represent.
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