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maxonik [38]
3 years ago
14

Xis directly proportional to y.

Mathematics
1 answer:
OleMash [197]3 years ago
6 0
X = k x y
21 = k x 3
k = 7
x = 7y

x = 7(10)
x = 70
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The upper limit of this interval is:

\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.069 + 1.28\sqrt{\frac{0.069*0.931}{1067}} = 0.079

The 80% confidence interval for the population proportion of disks which are defective is (0.059, 0.079).

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