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Oxana [17]
3 years ago
5

The slope of the graph of the equation y=2x-2 s 2 What is y-intercept

Mathematics
1 answer:
DaniilM [7]3 years ago
3 0

Answer:

Y=2x-2

2x is the slope

-2 is the y intercept

Step-by-step explanation:

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Answer:

Null hypothesis:\mu \leq 8000  

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z=\frac{8300-8000}{\frac{1200}{\sqrt{64}}}=2  

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Step-by-step explanation:

1) Data given and notation  

\bar X=8300 represent the sample mean  

\sigma=1200 represent the population standard deviation  

n=64 sample size  

\mu_o =800 represent the value that we want to test  

\alpha represent the significance level for the hypothesis test.  

z would represent the statistic (variable of interest)  

p_v represent the p value for the test (variable of interest)  

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We need to conduct a hypothesis in order to check if the mean is higher than 8000, the system of hypothesis are :  

Null hypothesis:\mu \leq 8000  

Alternative hypothesis:\mu > 8000  

Since we know the population deviation, is better apply a z test to compare the actual mean to the reference value, and the statistic is given by:  

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}} (1)  

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3) Calculate the statistic  

We can replace in formula (1) the info given like this:  

z=\frac{8300-8000}{\frac{1200}{\sqrt{64}}}=2  

4) P-value  

Since is a one-side upper test the p value would given by:  

p_v =P(Z>2)=0.0228  

5) Conclusion  

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