Oscar started freaking out about the test change into formal sentence brainly.

Does any1 here happen to have twitter?

vekshin1

Answer:

nope

Explanation:

3 0

3 years ago

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How many credit hours does a student typically need to complete general education requirements at a four-year college?

Nikolay [14]

Answer:depends on the college but generally 32-36 also depends on what your studying

Explanation:

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3 years ago

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A study suggests that about 80\%80%80, percent of undergraduate students are working at a job. Researchers plan to do a follow-u

Leni [432]

Using the z-distribution, it is found that the smallest sample size required to obtain the desired margin of error is of 4330.

<h3>What is a confidence interval of proportions?</h3>

A confidence interval of proportions is given by:

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

In which:

$\pi$ is the sample proportion.

z is the critical value.

n is the sample size.

The margin of error is given by:

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

In this problem:

The estimate of the proportion is of $\pi = 0.8$ .

The desired margin of error is of M = 0.01.

90% confidence level, hence $\alpha = 0.9$ , z is the value of Z that has a p-value of $\frac{1+0.9}{2} = 0.95$ , so $z = 1.645$ .

Then, we solve for n to find the minimum sample size.

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

$0.01 = 1.645\sqrt{\frac{0.8(0.2)}{n}}$

$0.01\sqrt{n} = 1.645\sqrt{0.8(0.2)}$

$\sqrt{n} = \frac{1.645\sqrt{0.8(0.2)}}{0.01}$

$(\sqrt{n})^2 = \left(\frac{1.645\sqrt{0.8(0.2)}}{0.01}\right)^2$

$n = 4329.6$

Rounding up, the smallest sample size required to obtain the desired margin of error is of 4330.

To learn more about the z-distribution, you can take a look at brainly.com/question/12517818

7 0

2 years ago

Hugo plans to buy packs of baseball cards until he gets the card of his favorite player, but he only has enough money to buy at

netineya [11]

Considering the given discrete probability distribution, it is found that there is a 0.36 = 36% probability that Hugo buys fewer than 3 packs.

<h3>What is the discrete probability distribution?</h3>

Researching on the internet, it is found that the discrete probability distribution for the number of packs that Hugo buys is given by:

P(X = 1) = 0.2.

P(X = 2) = 0.16.

P(X = 3) = 0.128.

P(X = 4) = 0.512.

The probability that he buys fewer than 3 packs is given by:

P(X < 3) = P(X = 1) + P(X = 2).

Hence:

P(X < 3) = P(X = 1) + P(X = 2) = 0.2 + 0.16 = 0.36.

There is a 0.36 = 36% probability that Hugo buys fewer than 3 packs.

More can be learned about discrete probability distributions at brainly.com/question/24855677

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2 years ago

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What can i do to prepare for psat’s in my first year of high school

postnew [5]

Answer: takes your classes notes and keep them they help when reviewing for the psat specially math

3 0

3 years ago