Editing Statistics and Statistical Programming (Spring 2019)/Problem Set: Week 8
From CommunityData
The edit can be undone. Please check the comparison below to verify that this is what you want to do, and then publish the changes below to finish undoing the edit.
Latest revision | Your text | ||
Line 13: | Line 13: | ||
:: (b) Plot the residuals by your values of x. | :: (b) Plot the residuals by your values of x. | ||
:: (c) A QQ plot. | :: (c) A QQ plot. | ||
: '''PC6.''' Generate a nice looking publication-ready table with the fitted model formatted as | : '''PC6.''' Generate a nice looking publication-ready table with the fitted model formatted as HTML or LaTeX. | ||
Line 19: | Line 19: | ||
: '''PC7.''' Load up the full dataset and fit the following linear model. Be ready to interpret the results in the same way you did for PC4 above: | : '''PC7.''' Load up the full dataset and fit the following linear model. Be ready to interpret the results in the same way you did for PC4 above: | ||
:: <math>\widehat{\mathrm{fruit}} = \beta_0 + \beta_1 \mathrm{obama} + \varepsilon</math> | :: <math>\widehat{\mathrm{fruit}} = \beta_0 + \beta_1 \mathrm{obama} + \varepsilon</math> | ||
: '''PC8.''' Examine the residuals for your model in and try to interpret these as you did in PC4 above. What do you notice? | : '''PC8.''' Examine the residuals for your model in and try to interpret these as you did in PC4 above. What do you notice? | ||
: '''PC9.''' Run the model on three subsets of the dataset: just 2012, 2014, and 2015. Be prepared to talk through the results. | : '''PC9.''' Run the model on three subsets of the dataset: just 2012, 2014, and 2015. Be prepared to talk through the results. | ||
Line 25: | Line 25: | ||
: '''SQ0.''' Any questions or clarifications from the PSU material or the OpenIntro text? | : '''SQ0.''' Any questions or clarifications from the PSU material or the OpenIntro text? | ||
<!---: '''SQ1-Q4.''' The next four questions are all of the form "interpret this model" and are using the example we used in the text. They are listed on [https://faculty.washington.edu/makohill/com521/week_06_statistics_questions.nb.html this page I've created] (it requires a UW NetID). If it's helpful, that page also includes all the R code so you can try stuff out yourself.---> | <!---: '''SQ1-Q4.''' The next four questions are all of the form "interpret this model" and are using the example we used in the text. They are listed on [https://faculty.washington.edu/makohill/com521/week_06_statistics_questions.nb.html this page I've created] (it requires a UW NetID). If it's helpful, that page also includes all the R code so you can try stuff out yourself.---> | ||
: '''SQ1.''' Exercise 8.14 on evaluating regression residuals (no sub-parts) | |||
: ''' | : '''SQ1.''' Exercise 8.4 on school absenteeism | ||
: ''' | : '''SQ2.''' Exercise 8.10 on school absenteeism again (no sub-parts) | ||
: '''SQ3.''' Exercise 8.14 on evaluating regression residuals (no sub-parts) | |||
: '''SQ4.''' Exercise 8.16 on Challenger o-rings. | |||
: '''SQ5.''' Exercise 8.18 which is more on Challenger o-rings. | |||
== Empirical Paper Questions == | == Empirical Paper Questions == | ||
Line 34: | Line 37: | ||
: '''EQ0.''' Any questions or clarifications from the paper that we didn't cover last week? | : '''EQ0.''' Any questions or clarifications from the paper that we didn't cover last week? | ||
: '''EQ1.''' Be ready to explain what all of Table 5 means in both statistical and substantive terms. In particular, be ready to interpret all of the coefficients and to explain what the t-statistics, <math>R^2</math>, and p-values mean | : '''EQ1.''' Be ready to explain what all of Table 5 means in both statistical and substantive terms. In particular, be ready to interpret all of the coefficients and to explain what the t-statistics, <math>R^2</math>, and p-values mean. | ||
: '''EQ2.''' Be ready to explain what Table 4 means in both statistical and substantive terms. In particular, be ready to interpret the coefficients in substantive terms and be ready to explain what the Z-statistics, Pseudo <math>R^2</math>, and p-values mean. | : '''EQ2.''' Be ready to explain what Table 4 means in both statistical and substantive terms. In particular, be ready to interpret the coefficients in substantive terms and be ready to explain what the Z-statistics, Pseudo <math>R^2</math>, and p-values mean. | ||
And these questions focus on issues raised by Reinhart in §8 and §9. | And these questions focus on issues raised by Reinhart in §8 and §9. | ||