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patriot [66]
3 years ago
7

Use a scientific/statistic calculator to find the correlation coefficient of the data points (1, 1), (2, 5), (4, 7), (5, 12), an

d (7, 15). Round the correlation coefficient to the nearest thousandth.
A. 0.978
B. 0.875
C. 0.956
D. 0.819
Mathematics
2 answers:
Softa [21]3 years ago
6 0
I think B is your answer
Anna35 [415]3 years ago
6 0
I think the answer is A
Step by step
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Answer:

75%

88.89%

Step-by-step explanation:

Given :

Mean = 70

Standard deviation = 12

Since the data is said to be extremely skewed, we apply Chebyshev's theorem rather than the empirical rule :

The minimum proportion of observation between 46 and 94

Chebyshev's theorem :

1 - 1 / k²

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k = (94 - 70) / 12 = 24 / 12 = 2

Hence, we have ;

1 - 1/2²

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Hence,

1 - 1/3² = 1 - 1/9 = 8/9 = 0.8888 = 88.89%

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