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Brrunno [24]
2 years ago
15

Select the correct answer.

Mathematics
2 answers:
arlik [135]2 years ago
6 0

Option B is correct

Why

3x=21

3(7) =21

21=21

Step-by-step explanation:

kolbaska11 [484]2 years ago
5 0

Answer:

-3x=21 , -7

Step-by-step explanation:

-3x=21\\x=\frac{21}{-3} =-7

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Answer:

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Step-by-step explanation:

It's important to refresh the p value method or p value approach . "This method is about determining "likely" or "unlikely" by determining the probability assuming the null hypothesis were true of observing a more extreme test statistic in the direction of the alternative hypothesis than the one observed". Or in other words is just a method to have an statistical decision to fail to reject or reject the null hypothesis.  

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The next step would be calculate the p value for this test.  Since is a bilateral test or two tailed test, the p value would be:  

p_v =2*P(t_{7}>2.35)=2*0.0255=0.051  

If we compare the p value and using the significance level given \alpha=0.05 we have p_v>\alpha so we can conclude that we have enough evidence to FAIL to reject the null hypothesis, and we can said that at 5% or 1% of significance we fail to reject the null hypothesis.  

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