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raketka [301]
3 years ago
5

I need help...... someone plzzz help

Mathematics
2 answers:
bagirrra123 [75]3 years ago
8 0
The answer is 58 and 39
BaLLatris [955]3 years ago
8 0

Answer:

x is 58. y is 34

Step-by-step explanation:

x + y = 97.

x - y = 19

If you add the 2 equations together, isolate the variable x, and then plug that number into the first equation, you get these numbers.

x + y + (x - y) = 97 + 19

2x = 97 +19

2x = 116

divide both sides by 2

x = 58

plug it into the first equation and solve for y and you'll get 34.

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Step-by-step explanation:

Data given and notation n  

n represent the random sample taken

\hat p estimated proportion of interest

p_o=0.36 is the value that we want to test

z would represent the statistic (variable of interest)

p_v represent the p value (variable of interest)  

Concepts and formulas to use  

We need to conduct a hypothesis in order to test the claim that the true proportion is 0.36 so then we need to conduct a two tailed test, the system of hypothesis are.:  

Null hypothesis:p=0.36  

Alternative hypothesis:p \neq 0.36  

When we conduct a proportion test we need to use the z statisitc, and the is given by:  

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

The One-Sample Proportion Test is used to assess whether a population proportion  is significantly different from a hypothesized value .

Calculate the statistic  

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z = 2.074

Statistical decision  

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.

The next step would be calculate the p value for this test.  

Since is a bilateral test the p value would be:  

p_v =2*P(z>2.074)=0.0381  

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