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2 years ago

By examining past tournaments, it's possible to calculate the probability that a school wins their

Mathematics

1 answer:

vekshin12 years ago

6 0

An serveur

Réponses 30 ou 60 et maintenant

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AJLK ~ APQR. Find the value of x. P 45 36 15 39 K 13 x=

alexgriva [62]

Answer:

36 divided by 2 is 18 = plus 1p

Step-by-step explanation:

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2 years ago

With regard to the example given in Question 8 above, if everything else stayed

inysia [295]

Answer:

Step-by-step explanation:

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2 years ago

How would you convert a measurement given in fluid onuces into pints

Alexus [3.1K]

Multiply the quantity in ounces (including the unit) by the fraction

(1 pint) / (16 fl oz) .

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2 years ago

At 95% confidence, how large a sample should be taken to obtain a margin of error of 0.03 for the estimation of a population pro

Gnom [1K]

Answer:

A sample of 1068 is needed.

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

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

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

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

At 95% confidence, how large a sample should be taken to obtain a margin of error of 0.03 for the estimation of a population proportion?

We need a sample of n.

n is found when M = 0.03.

We have no prior estimate of $\pi$ , so we use the worst case scenario, which is $\pi = 0.5$

Then

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

$0.03 = 1.96\sqrt{\frac{0.5*0.5}{n}}$

$0.03\sqrt{n} = 1.96*0.5$

$\sqrt{n} = \frac{1.96*0.5}{0.03}$

$(\sqrt{n})^{2} = (\frac{1.96*0.5}{0.03})^{2}$

$n = 1067.11$

Rounding up

A sample of 1068 is needed.

8 0

2 years ago

Your parents car initially costs $18,000 and it depreciates at a rate of 12% a year. How much will the car be worth after 5 year

coldgirl [10]

Answer:

Step-by-step explanation:

value after five years = $18,000×(1-0.12)⁵ = 18,000×0.88⁵ = $9,499.17

:::::

The value drops below $2,000 in the 17th year.

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2 years ago