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3 years ago

Will give brainliest the the first answer!!!

Mathematics

1 answer:

mojhsa [17]3 years ago

6 0

Answer:

(DONT INCLUDE THE LETTERS, IT JUST TRIES TO CONFUSE)

So, -1/4 is more than 3 (which you should know) and 3-12 is -9, then it says -9 is more than 12, which is not true. You should show your work as a model explaining what I explained earlier. So you would answer non-equal. Thanks for helping run my brain (lol)

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A trapezoid is a quadrilateral with one or more pairs of parallel sides.<br> O A. True<br> OB. False

salantis [7]

The answer is B. False

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2 years ago

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3/8 to 7/8 find the percent of change and is it decrease or increase

mote1985 [20]

Answer:133.33%

Step-by-step explanation:

For given change in fractions from $\frac{3}{8}$ to $\frac{7}{8}$

The initial fraction= $\frac{3}{8}$

New fraction= $\frac{7}{8}$

Change in fractions= New fraction-Initial fraction

$=\frac{7}{8}-\frac{3}{8}\\\\=\frac{7-3}{8}\\\\=\frac{4}{8}\\=\frac{1}{2}$

As change in fraction is positive thus it is an increase.

$\text{Percent of increase=}\frac{\text{increase in fraction}}{\text{initial fraction}}\times100\\\\=\frac{\frac{1}{2}}{\frac{3}{8}}\times100\\\\=\frac{1}{2}\times\frac{8}{3}\times100\\\\=\frac{400}{3}=133.33\%$

4 0

4 years ago

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What is the formula for a confidence interval?

ikadub [295]

Answer:

a) The formula is given by mean $\pm$ the margin of error. Where the margin of error is the product between the critical value from the normal standard distribution at the confidence level selected and the standard deviation for the sample mean.

b) $\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

If the distribution for X is normal or if the sample size is large enough we know that the distribution for the sample mean $\bar X$ is given by:

$\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})$

Part a

The formula is given by mean $\pm$ the margin of error. Where the margin of error is the product between the critical value from the normal standard distribution at the confidence level selected and the standard deviation for the sample mean.

Part b

The confidence interval for the mean is given by the following formula:

$\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$

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4 years ago

Can someone help me???

Viktor [21]

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3 years ago

Is 1/3 closer to 0 or 0.5

olya-2409 [2.1K]

Answer:

its closer to 0.5

Step-by-step explanation:

if you change 1/3 to a decimal its going to be 0.333333

0.33333 is closer to 0.5

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3 years ago

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Will give brainliest the the first answer!!!​

Will give brainliest the the first answer!!!