Question

In: Statistics and Probability

What specifically is used to decide whether to reject or fail to reject the null hypothesis?...

  1. What specifically is used to decide whether to reject or fail to reject the null hypothesis? [1 sentence]
  2. How do you tell whether the test is left, right, or two tailed? [3 bullets]
  3. A student calculates a p-value and tells you the answer is 2.33. Explain why this could not be correct. [2 sentences]
  4. Why can we never accept the null hypothesis? [2 sentences]
  5. Why does decreasing the probability of making a type one error increase the probability of making a type two error? [2 sentences]
  6. How does a researcher decide the level of significance for a hypothesis test? [3 sentences]
  7. Explain what a p-value is in your own words [3 sentences]

Solutions

Expert Solution

1. There are two methods

a) Critical value approach - if |test stats| > Critical value reject Ho

b) If the p-value is less than significance level then reject the Ho

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2. The alternative hypothesis is the reference for that.

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3. P-value is the probability and probability

and here it is greater than 1 which is not possible.

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4.  Either we reject or fail to reject the null hypothesis , it is totally based on evidence

orchestra answered 2 years ago
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