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quester [9]
3 years ago
6

Help! Check if my answer is right please, I’m marking brainliest!!!

Mathematics
1 answer:
Flauer [41]3 years ago
6 0

9514 1404 393

Answer:

  B.  50.1  --  you are correct

Step-by-step explanation:

The relation in this geometry is ...

  BW² = BU·BL

  BW = √(33(33+43)) ≈ 50.08

  BW ≈ 50.1

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Mamont248 [21]
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Step-by-step explanation:

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There is a relationship between confidence interval and standard deviation:
\theta=\overline{x} \pm \frac{z\sigma}{\sqrt{n}}
Where \overline{x} is the mean, \sigma is standard deviation, and n is number of data points.
Every confidence interval has associated z value. This can be found online.
We need to find the standard deviation first: 
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Now we can find confidence intervals:
($90\%,z=1.645): \theta=123.8 \pm \frac{1.645\cdot 11.84}{\sqrt{15}}=123.8 \pm5.0\\($95\%,z=1.960): \theta=123.8 \pm \frac{1.960\cdot 11.84}{\sqrt{15}}=123.8 \pm 5.99\\ ($99\%,z=2.576): \theta=123.8 \pm \frac{2.576\cdot 11.84}{\sqrt{15}}=123.8 \pm 7.87\\
We can see that as confidence interval increases so does the error margin. Z values accociated with each confidence intreval also get bigger as confidence interval increases.
Here is the link to the spreadsheet with standard deviation calculation:
https://docs.google.com/spreadsheets/d/1pnsJIrM_lmQKAGRJvduiHzjg9mYvLgpsCqCoGYvR5Us/edit?usp=sharing
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-9 ≤ <em>g</em>(<em>t </em>) ≤9


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