3 years ago

Help smart peep with 5. And6

Mathematics

1 answer:

tia_tia [17]3 years ago

6 0

Vejeieve veiiebd e628382628

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1. d. Two sided t-test

2. b. 0.000193

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Step-by-step explanation:

The hypothesis testing is used to test the claim against the alternative hypothesis. The p value is determined in order to conclude the result for the test as whether to accept or reject the null hypothesis. The null hypothesis can be accepted when the p value is greater than the critical value of the t-test.

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The first sentence is not true in general. Consider the equation $|x|=-1$ . There are no solutions. Now consider $|x|=0$ . There is only one solution, $x=0$ .

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$|x|=\begin{cases}x&\text{for }x\ge0\\-x&\text{for }x$

So suppose $x\ge0$ . Then

$|x|=9\implies x=9$

Now suppose $x$ . Then

$|x|=9\implies -x=9\implies x=-9$

So two solutions to $|x|=9$ are $x=\pm9$ .

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