are these examples/definitions of CORRELATIONS correct? (positive, negative, etc.)?

Question

* positive correlation – a relationship between two variables in which when one increases, the other increases as well, or when one decreases, so does the other
positive correlation ex: The INCREASE of algae in the lake caused an INCREASE of a certain species of algae eating fish.

* negative correlation – a relationship between two variables in which when one of the variables increase, the values of the second variable decrease, or visa versa
negative correlation ex: People who consume MORE vitamin D have colds LESS often.

* perfect correlation – when a change in the value of one variable occurs, the value of the next variable is changed in exact proportion, whether it’s a negative or positive correlation
perfect positive correlation ex: When the lizard doesn’t drink any liquids in a single day it doesn’t produce any urine during that day.
perfect negative correlation ex: For ever one person occupying a seat on the bus there is one seat that is no longer available.

* strong correlation – where the variables are sensitive to each others changes or behavior, and measure more closely together; strong correlation can occur in positive and negative correlation
strong positive correlation ex: The more time people spend in the sun the darker their tans get.
strong negative correlation ex: The more the family rides their bikes the less gas they need to buy for their cars.

* weak correlation – where the relationship between variables are rather disperse, but still have a generally relationship. and measure more closely together; strong correlation can occur in positive and negative correlation
weak positive correlation ex: The bigger kids’ noses are the more they get bullied.
weak negative correlation ex: Towns with more littering in their streets have less public trash cans available.

* no correlation – when there is no relationship between variables.
no correlation ex: A comparison between the number of car wreaks there are each day with the most common color tie men wear.

Answer 1

Yes. Although I would use a different example than the family riding bicycles.People can ride for recreation and it won't reduce auto usage. Maybe: the more often Tom commutes to work on the bus, the fewer miles he will put on his car.

Answer 2

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RE:

are these examples/definitions of CORRELATIONS correct? (positive, negative, etc.)?

* positive correlation – a relationship between two variables in which when one increases, the other increases as well, or when one decreases, so does the other

positive correlation ex: The INCREASE of algae in the lake caused an INCREASE of a certain species of algae eating fish.



* negative...

Answer 3

All are correct.

never came across perfect correlation but it must be arithmatical proportionality and does not fall under statistics. No correlation is for coef. =0, which seldom occurs for a large set of data. The terms weak and strong are rather qualitative and depend upon the "confidence level" acceptable in the calculations. so, change in that makes a weak as strong and vice versa. To make the results authentic ( obviously), a strong one can be called perfect and a weak one as no.

Answer 4

I am sorry I don't know about this

Answer 5

I have no idea about this