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Ket [755]
2 years ago
14

Please help!!!!!! i need to know what the answer is and how to do it.

Mathematics
1 answer:
swat322 years ago
6 0

Answer:

Step-by-step explanation:

b

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We wish to give a 90% confidence interval for the mean value of a normally distributed random variable. We obtain a simple rando
coldgirl [10]

Answer: (9.27025,\ 11.12975)

Step-by-step explanation:

Given : Sample size : n= 9

Degree of freedom = df =n-1 =8

Sample mean : \overline{x}=10.2

sample standard deviation : s= 1.5

Significance level ; \alpha= 1-0.90=0.10

Since population standard deviation is not given , so we use t- test.

Using t-distribution table , we have

Critical value = t_{\alpha/2, df}=t_{0.05 , 8}=1.8595

Confidence interval for the population mean :

\overline{x}\pm t_{\alpha/2, df}\dfrac{s}{\sqrt{n}}

90% confidence interval for the mean value will be :

10.2\pm (1.8595)\dfrac{1.5}{\sqrt{9}}

10.2\pm (1.8595)\dfrac{1.5}{3}

10.2\pm (1.8595)(0.5)

10.2\pm (0.92975)

(10.2-0.92975,\ 10.2+0.92975)

(9.27025,\ 11.12975)

Hence, the 90% confidence interval for the mean value= (9.27025,\ 11.12975)

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3 years ago
How to find out the slope
grin007 [14]
To find the slope, you divide the difference of the y-coordinates of 2 points on a line by the difference of the x-coordinates of those same 2 points .
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2 years ago
What is the result of<br> multiplying 35.8 by 7.9?
maria [59]

Answer: If you multiply 35.8*7.9 you will get a result of 282.82

Step-by-step explanation:

4 0
3 years ago
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Can dirt be cooked through Newton’s order how is the atoms entitled and which Eliment is directed for cooking
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Answer:

yes

Step-by-step explanation:

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The temperature dropped from 75 degrees to 50 degrees
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50%

Step-by-step explanation:

sorry I don't have an explanation...

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2 years ago
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