Mathematics: *will mark brainliest! answer ! * dayshawn says that (-8)()() simplified would be a positive answer. is he correct? why or why not?

*will mark brainliest! answer ! * dayshawn says

julio7264

30.09.2020

No,It will be a negative answer.

Step-by-step explanation:

We can see that there are 3 negative numbers.

2 negatives numbers multiplied makes a positive number.

The remaining negative number will make the answer a negative number.

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Demondevilg

06.12.2020

The z-statistic for this test is -1.547 and P-value of the test is 0.0618

Step-by-step explanation:

An article in the Washington Post on March 16, 1993 stated that nearly 45 percent of all Americans have brown eyes.

We are given that A random sample of n=82 C of I students found 30 with brown eyes.

n = 82

x = 30

$H_0:p=0.45\\ H_a:p\neq0.45$

Now to find z statistic we will use one sample proportion test

$\widehat{p}=\frac{x}{n}$

$\widehat{p}=\frac{30}{82}$

$\widehat{p}=0.365$

Formula of test statistic = $\frac{\widehat{p}-p}{\sqrt{\frac{p(1-p)}{n}}}$

= $\frac{0.365-0.45}{\sqrt{\frac{0.45(1-0.45)}{82}}}$

= -1.547

So, the z-statistic for this test is -1.547

Now refer the z table for p value .

p value = 0.0618

The P-value of the test is 0.0618

Hence the z-statistic for this test is -1.547 and P-value of the test is 0.0618

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