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Lena [83]
3 years ago
8

THIS IS MY LIKE 5TH TIME ASKING THIS QUESTION PLEASE ANSWER FULLY AND CORRECTLY!!!

Mathematics
1 answer:
kotykmax [81]3 years ago
3 0
After using y1 + y2 / 2, if they bisect it should be at the same midpoint.
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An engineer wishes to determine the width of a particular electronic component. If she knows that the standard deviation is 1.6
nexus9112 [7]

Answer:

n=1705

Step-by-step explanation:

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".  

Assuming the X follows a normal distribution  

X \sim N(\mu, \sigma=1.6)  

And the distribution for \bar X is:

\bar X \sim N(\mu, \frac{1.6}{\sqrt{n}})  

We know that the margin of error for a confidence interval is given by:  

Me=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}   (1)  

The next step would be find the value of \z_{\alpha/2}, \alpha=1-0.99=0.01 and \alpha/2=0.005  

Using the normal standard table, excel or a calculator we see that:  

z_{\alpha/2}=\pm 2.58  

If we solve for n from formula (1) we got:  

\sqrt{n}=\frac{z_{\alpha/2} \sigma}{Me}  

n=(\frac{z_{\alpha/2} \sigma}{Me})^2  

And we have everything to replace into the formula:  

n=(\frac{2.58(1.6)}{0.1})^2 =1704.03  

And if we round up the answer we see that the value of n to ensure the margin of error required \pm=0.1 mm is n=1705.  

6 0
3 years ago
What is 2/7 + 6/10 in fraction form
frez [133]

Answer:

31/35

Step-by-step explanation:

= 62/70

= 62 ÷ 2/70 ÷ 2

= 31/35

5 0
3 years ago
Read 2 more answers
Directions: Simplify the following monomials.SHOW THE STEPS!
Pavel [41]

Answer:

I hope you enjoy it if you have any questions ask me

4 0
2 years ago
Read 2 more answers
What percentage of videos on the streaming site are between 39 and 189 seconds?
PolarNik [594]

Answer:

B) 15.85%

Step-by-step explanation:

normalcdf(minimum,maximum,μ,σ)

normalcdf(39,189,264,75)

≈0.1573

≈15.73%

Therefore, the closest answer is B

4 0
2 years ago
Can someone help with this!
Sveta_85 [38]

In the given image, a_{23} is 5. The correct option is the first option 5

<h3>Matrix notation</h3>

From the question, we are to determine which entry in the given matrix represents a_{23}

NOTE: For any entry denoted as a_{mn}, it represents the entry in the <em>m</em>-th row and <em>n</em>-th column.

Thus,  

 a_{23} represents the entry in the 2nd row and 3rd column.

In the given image, the entry in the 2nd row and 3rd column is 5.

Hence, in the given image, a_{23} is 5. The correct option is the first option 5

Learn more on Matrix notation here: brainly.com/question/2382978

#SPJ1

5 0
2 years ago
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