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dedylja [7]
3 years ago
12

Please tell me what x is 3(x+6)=48

Mathematics
1 answer:
Alekssandra [29.7K]3 years ago
7 0

Answer

X=10

Step by step explanation

48÷3 = 16

16-6 = 10

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Assume the sample variances to be continuous measurements. Find the probability that a random sample of 25observations, from a n
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Answer:

a) P(4S^2 > 4*9.1) = P(\chi^2_{24} >36.4) = 0.0502

b)P(13.848Step-by-step explanation:

Previous concepts

The Chi Square distribution is the distribution of the sum of squared standard normal deviates .

For this case we assume that the sample variance is given by S^2 and we select a random sample of size n from a normal population with a population variance \sigma^2. And we define the following statistic:

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For this case we know that n =25 and \sigma^2 = 6 so then our statistic would be given by:

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Solution to the problem

Part a

For this case we want this probability:

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And we can multiply the inequality by 4 on both sides and we got:

P(4S^2 > 4*9.1) = P(\chi^2_{24} >36.4) = 0.0502

And we can use the following excel code to find it: "=1-CHISQ.DIST(36.4,24,TRUE)"

Part b

For this case we want this probability:

P(3.462 < S^2

If we multiply the inequality by 4 on all the terms we got:

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Answer:

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