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3 years ago

Given an experiment ,can you answer questions about the probability?

Mathematics

1 answer:

cestrela7 [59]3 years ago

7 0

Answer:

yes

Step-by-step explanation:

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What’s two more than a number in the expression form

skad [1K]

The answer is x+2 b/c
a) whenever it says than it means that this part goes second.
b) a number - substitute w/ any letter
ex: x
c) put it together
two more than (_+2) a number (x) is x+2

3 0

3 years ago

I will give the brainliest crown to whoever gets it right!

qaws [65]

Answer:

Step-by-step explanation:

x + (x+2) + (x+4) + (x+6) + (x+8) + (x+10) = 456

6x + 30 = 456

add -30 to each side

6x = 426

divide each side by 6

x = 71

4 0

3 years ago

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A researcher is interested in estimating the mean blood alcohol content of people arrested for driving under the influence. Base

UNO [17]

Answer:

We need a sample size of at least 650

Step-by-step explanation:

We have that to find our $\alpha$ level, that is the subtraction of 1 by the confidence interval divided by 2. So:

$\alpha = \frac{1-0.95}{2} = 0.025$

Now, we have to find z in the Ztable as such z has a pvalue of $1-\alpha$ .

So it is z with a pvalue of $1-0.025 = 0.975$ , so $z = 1.96$

Now, find the margin of error M as such

$M = z*\frac{\sigma}{\sqrt{n}}$

In which $\sigma$ is the standard deviation of the population and n is the size of the sample.

In this problem:

We need a sample of size at least n

n is found when $M = 0.005, \sigma = 0.065$

$M = z*\frac{\sigma}{\sqrt{n}}$

$0.005 = 1.96*\frac{0.065}{\sqrt{n}}$

$0.005\sqrt{n} = 1.96*0.065$

$\sqrt{n} = \frac{1.96*0.065}{0.005}$

$(\sqrt{n})^{2} = (\frac{1.96*0.065}{0.005})^{2}$

$n = 649.23$

Rounding up

We need a sample size of at least 650

7 0

3 years ago

The amount of time it takes Oliver to run his trains around the toy railroad track is directly proportional to the number of t

inysia [295]

Answer:

the answer is 5ac

Step-by-step explanation:

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3 years ago

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HELP PLEASE <br> HOW DO I DO THIS?????<br> WHAT IS IT????

GarryVolchara [31]

Answer:

Step-by-step explanation:

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3 years ago