Week 3.3 IRM
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Questions and Answers

True or false: The p value represents the probability of observing the test statistic assuming that the null hypothesis is true.

True

True or false: The alternative hypothesis states that those who sleep 7 hours or more per night will show better memory performance than those who sleep less than 7 hours.

True

True or false: The null hypothesis testing process involves formulating a hypothesis, collecting relevant data, fitting a model to the data, and assessing the statistical significance of the result.

True

Which step of null hypothesis testing involves fitting a model to the data and computing the test statistics?

<p>Step 4</p> Signup and view all the answers

What does the p value represent in null hypothesis testing?

<p>The probability of observing the test statistic assuming the null hypothesis is true</p> Signup and view all the answers

What is the alternative hypothesis in the context of this lecture?

<p>Those who sleep 7 hours or more per night will show better memory performance than those who sleep less than 7 hours</p> Signup and view all the answers

Match the following steps with their descriptions in the null hypothesis testing process:

<p>Step 1 = Formulate a hypothesis that embodies our prediction Step 3 = Collect some data relevant to the hypothesis Step 5 = Compute the probability of the observed value of that statistic assuming that the null hypothesis is true Step 6 = Assess the 'statistical significance' (p value) of the result</p> Signup and view all the answers

Match the following concepts with their definitions:

<p>Null hypothesis = The hypothesis that there is no significant difference between specified populations Alternative hypothesis = The hypothesis that states there is a significant difference between specified populations P value = The probability of observing the test statistic assuming that the null hypothesis is true Statistical significance = A statistical term to indicate that a result is not likely to occur randomly, but rather is likely to be attributable to a specific cause</p> Signup and view all the answers

Match the following hypotheses with their definitions:

<p>Prediction = A hypothesis formulated before seeing the data Null = A hypothesis that embodies no significant difference between specified populations Alternative/Experimental = A hypothesis that states there is a significant difference between specified populations Statistical Significance = A term used to indicate that a result is not likely to occur randomly, but rather is likely to be attributable to a specific cause</p> Signup and view all the answers

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