GENETICS AND EVOLUTION
INHERITANCE AND VARIATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Negative correlation and likely a causal relationship
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Negative correlation but not a causal relationship
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Positive correlation but not a causal relationship
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Positive correlation and likely a causal relationship
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Detailed explanation-1: -Causation means one thing causes another-in other words, action A causes outcome B. On the other hand, correlation is simply a relationship where action A relates to action B-but one event doesn’t necessarily cause the other event to happen.
Detailed explanation-2: -The formula for the test statistic is t=r√n−2√1−r2. The value of the test statistic, t, is shown in the computer or calculator output along with the p-value. The test statistic t has the same sign as the correlation coefficient r. The p-value is the combined area in both tails.
Detailed explanation-3: -Correlation tests for a relationship between two variables. However, seeing two variables moving together does not necessarily mean we know whether one variable causes the other to occur. This is why we commonly say “correlation does not imply causation.”
Detailed explanation-4: -Correlation implies association, but not causation. Conversely, causation implies association, but not correlation.