Please respond to the following questions: What is the null hypothesis? Why do w

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Please respond to the following questions:
What is the null hypothesis? Why do we want to reject our null hypothesis?
The first step is the find the mean of our sample and compare it to the “hypothesized” mean of our null hypothesis—why do we do that?
We use the results of our first step to calculate a test-statistic. Why is this important and how does it relate to the concept of z-score, which we learned a few weeks ago?
What is a p-value? What role does it play in the rejection of the null hypothesis?
What does it mean to reject the null hypothesis? Does that guarantee that the null hypothesis is false?

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