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bezimeni [28]
3 years ago
7

WILL MARK BRAINLIEST ANSWER ASAP

Mathematics
1 answer:
Pavlova-9 [17]3 years ago
5 0

Answer:

A

Step-by-step explanation:

1

1 " a number x" →x.

2

2 "less than a number x" means to subtract →x−

3

3 "8 less than a number x" means to subtract →x−8.

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VARVARA [1.3K]

sorry not the answer i just needed to type this to get free time

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3 years ago
Your teacher will report the mean and standard deviation of the sampling distribution created by the class.
sukhopar [10]

Answer:

\hat p = \frac{\sum_{i=1}^{40} \hat p_i}{40}

\hat p = 0.493

And the deviation is given by this formula:

s_{\hat p}= \frac{\sum_{i=1}^{40} (\hat p_i - \hat p)^2}{n-1}= 0.085

And as we can see the population proportion expected for the number of heads 0.5  is very close to the mean of the sampling distribution, the error is :

\% Error = \frac{0.5-0.493}{0.5}* 100 = 1.4\%

Step-by-step explanation:

Assuming the data on the figure attached. We ar assuming that this is a sampling distribution of sample proportions of heads in 40 flips of a coin.

As we can see we have the following values:

0.25, 0.35, 0.375,0.375, 0.40,0.40,0.40, 0.425,0.425,0.425, 0.45,0.45,0.45,0.45, 0.475,0.475,0.475, 0.475,0.475, 0.50,0.50,0.50, 0.525,0.525,0.525,0.525, 0.55,0.55,0.55,0.55,0.55, 0.575,0.575,0.575 0.575, 0.575, 0.60,0.60, 0.65,0.65

And we can calculate the sample proportion with the following formula:

\hat p = \frac{\sum_{i=1}^{40} \hat p_i}{40}

\hat p = 0.493

And the deviation is given by this formula:

s_{\hat p}= \frac{\sum_{i=1}^{40} (\hat p_i - \hat p)^2}{n-1}= 0.085

And as we can see the population proportion expected for the number of heads 0.5  is very close to the mean of the sampling distribution, the error is :

\% Error = \frac{0.5-0.493}{0.5}* 100 = 1.4\%

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3 years ago
Help me out....my grades are bad I really need you guys help .... PLEASE. I am so done with life.
gladu [14]

Answer:

Step-by-step explanation:

google might work better

7 0
4 years ago
How would I rewrite this?
Anvisha [2.4K]

Answer:

-The answer is y^2 .

Step-by-step explanation:

When you divide numbers/variables with exponents, the exponents will subtract each other:

\frac{y^5}{y^3} =y^2

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4 years ago
Referring to the Fig. in Question #44, find the tangent of<br> ∠A. Give answer in simplest form.
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Answer:

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Step-by-step explanation:

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