Question: 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

  • 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 hypothesiswhy 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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