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3 years ago

OMG PLEASE HELP ITS SERIOUS!!! THX!!!!

Mathematics

2 answers:

const2013 [10]3 years ago

7 0

14: 82.80 since 32.75+39.88=72.63 and the tip is 10.17 if u round it to the nearest penny so 72.63+10.17=82.80

Naddik [55]3 years ago

6 0

I believe the total cost of the skateboard would be $75.15

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3 years ago

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3 years ago

A quality-conscious disk manufacturer wishes to know the fraction of disks his company makes which are defective. Step 2 of 2 :

const2013 [10]

Answer:

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

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

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80% confidence level

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The upper limit of this interval is:

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

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2 years ago

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