Decide whether you would reject or fail to reject the null hypothesis in the following situations: = 3.50, sD = 1.10, n = 12, a = .05, two-tailed test 95% CI = (0.20, 1.85) t = 2.98, t* = −2.36, one-tailed test to the left 90% CI = (−1.12, 4.36)

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A: Complete solution and answer is given in the image uploaded below  Thanks!

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Q: Q: If you are 90% sure about making the right decision, what is the alpha (α) value?

A: To find : If you are 90% sure about making the right decision, what is the alpha (α) value?

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A: Here  degree of freedom df=n1+n2-2  n1=16   n2=9   so  Df=16+9-2     =25-2      =23

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Q: what is the zobserved value for the hypothesis test?

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Q: What is the absolute critical value at which you reject the null hypothesis? tcritical= 2.960 2.690…

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Q: State whether the standardized test statistic z indicates that you should reject the null…

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