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3 years ago

-2(3x-4)+5x what is the answer

Mathematics

1 answer:

Fudgin [204]3 years ago

3 0

First open the bracket
= -6x+8 + 5x
= 5x-6x+ 8
= -x+8
= 8-x
Hope it helped!!
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Answer:

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Step-by-step explanation:

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The null hypothesis and the alternative hypothesis can be computed as:

Null hypothesis:

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Alternative hypothesis:

$H_1: \mu \neq 178$

The t-test statistics is determined by using the formula:

$t = \dfrac{X - \mu}{\dfrac{\sigma}{\sqrt{n}}}$

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Degree of freedom df = n- 1

Degree of freedom df = 25 - 1

Degree of freedom df = 24

At the level of significance ∝ = 0.05, the critical value = 2.064

Decision rule: To reject the null hypothesis if the test statistics is greater than the critical value at 0.05 level of significance

Conclusion: We fail to reject the null hypothesis since the test statistics is lesser than the critical value and we conclude that the difference exists due to chance since the test statistic is small

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