Answer:
It add up by 6.
Step-by-step explanation:
6 plus 6 is 12 plus another is 18 and it keeps going.
Answer:
1/2 ( or 0.5)
Step-by-step explanation:
13 Clubs / 13 Spades are black, total: 26
probability: 26 / 52 = 1/2
Answer:
r is always between 0 and 1
Step-by-step explanation:
The untrue statement is ...
r is always between 0 and 1
One way you can tell is that it is inconsistent with the true statement |r| ≤ 1.
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<em>Comment on correlation coefficient</em>
The correlation coefficient (r) is the ratio of the covariance of x and y to the product of the standard deviations of x and y. This formula is symmetrical in x and y, so it doesn't matter which data set you call x and which one you call y. Similarly, the units cancel, so r is a unitless number, and the units of x and y don't matter, either.
