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17 March, 00:46

Which correlation coefficient would indicate a strong negative relationship between the number of text messages sent and the age of the sender?

A) - 0.95

B) - 0.82

C) 0.05

D) 0.28

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Answers (2)
  1. 17 March, 01:00
    0
    A) - 0.95
  2. 17 March, 01:15
    0
    Answer: A) - 0.95

    The closer the value of r is to either - 1 or + 1 means that we have very strong correlation. In this case, r = - 0.95 is closest to - 1 compared to the other values. Also, no other value is really close to + 1, so we can ignore it.

    With r = - 0.95 very close to - 1, it means that there's a strong negative correlation. The higher the age, the less number of text messages the person sends. As age (x) goes up, the number of text messages (y) goes down.
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