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Kitty [74]
2 years ago
15

-3 < 5 true or false

Mathematics
2 answers:
irakobra [83]2 years ago
4 0

Answer:

true

Step-by-step explanation:

max2010maxim [7]2 years ago
3 0

Answer:

true?

Step-by-step explanation:

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35. In a simple random sample of 25 high school students, the sample mean of the SAT scores was 1450, and the sample variance wa
Tatiana [17]

Answer:

1450-2.0\frac{30}{\sqrt{25}}=1450-12    

1450+2.0\frac{30}{\sqrt{25}}=1450+12    

And the best option would be:

c. 1450 +/- 12

Step-by-step explanation:

Information provided

\bar X=1450 represent the sample mean for the SAT scores

\mu population mean (variable of interest)

s^2 = 900 represent the sample variance given

n=25 represent the sample size  

Solution

The confidence interval for the true mean is given by :

\bar X \pm z_{\alpha/2}\frac{\sigma}{\sqrt{n}}   (1)

The sample deviation would be s=\sqrt{900}= 30

The degrees of freedom are given by:

df=n-1=2-25=24

The Confidence is 0.954 or 95.4%, the value of \alpha=0.046 and \alpha/2 =0.023, assuming that we can use the normal distribution in order to find the quantile the critical value would be z_{\alpha/2} \approx 2.0

The confidence interval would be

1450-2.0\frac{30}{\sqrt{25}}=1450-12    

1450+2.0\frac{30}{\sqrt{25}}=1450+12    

And the best option would be:

c. 1450 +/- 12

3 0
3 years ago
Find square root of 82369 by division method step by step​
Lina20 [59]

Answer:

I think this ans may help you

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3 years ago
Using x as the variable, write a formula to find the perimeter of the figure. Use the formula to find the perimeter. a regular d
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Answer:

c. 12x; 111 cm

Step-by-step explanation:

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and if we substitute x = 9.25 cm, we find

p=12 \cdot 9.25 cm=111 cm

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2 years ago
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Uh, so, you're median is 81 already.

Since the middle two numbers are 82 and 80, you have to add them together and then divide by 2. 

However, if you're trying to add a number in, adding 81 as it is would work as well.

Hope this helps!
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3 years ago
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3 years ago
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