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Harlamova29_29 [7]
3 years ago
14

Let x be a random variable that represents the batting average of a professional baseball player. Let y be a random variable tha

t represents the percentage of strikeouts of a professional baseball player. A random sample of n = 6 professional baseball players gave the following information.
x 0.350 0.270 0.340 0.248 0.367 0.269
y 2.8 7.0 4.0 8.6 3.1 11.1
Verify that Σx = 1.844, Σy = 36.6, Σx2 = 0.579554, Σy2 = 279.62, Σxy = 10.4864, and r ≈ -0.896.
Σx 1
Σy 2
Σx2 3
Σy2 4
Σxy 5
r 6
Mathematics
1 answer:
marusya05 [52]3 years ago
3 0

the answer is Let x be a random variable that represents the batting average of a professional baseball player. Let y be a random variable that represents the percentage of strikeouts of a professional baseball player. A random sample of n = 6 professional baseball players gave the following information.

x 0.350 0.270 0.340 0.248 0.367 0.269

y 2.8 7.0 4.0 8.6 3.1 11.1

Verify that Σx = 1.844, Σy = 36.6, Σx2 = 0.579554, Σy2 = 279.62, Σxy = 10.4864, and r ≈ -0.896.

Σx 1

Σy 2

Σx2 3

Σy2 4

Σxy 5

r 6

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block 1 - 1, 2 - length 2

block 2 - 1, 2, 2 - length 3

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Recall the formula for the sum of consecutive positive integers,

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In the first 48 blocks, the sequence contains 48 copies of 1 and 1 + 2 + 3 + ... + 47 copies of 2, hence they make up a total of

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