Exam 4 Study Guide: Chapters 18-20

  1. Five scatter plots are shown. Match the scatter plot with the value of the correlation coefficient. Look at homework 24.
  2. Identify the type of linear correlation based on the value of r and the p-value. Four parts. Look at homework 24.
  3. Complete the ANOVA table. This is a "difficult" level ANOVA table from the ANOVA generator that we looked at in class.
  4. Correlation and regression - the regression equation is given.
    1. Complete the table of coefficients
    2. Give a conclusion about the y-intercept or slope
    3. Use the regression equation to estimate a value of the response variable.
    4. The Sum of Squares are given, complete the ANOVA table.
    5. Find the value of the coefficient of determination, r2
  5. Correlation and regression - the summary statistics, correlation coefficient and p-value are given. Look at homework 25.
    1. Give a conclusion
    2. Write the coordinates of the centroid
    3. Find the slope of the regression equation
    4. Write the equation of the regression line
    5. Use the equation to estimate a value of the dependent variable.
    6. Complete the ANOVA table. This table is completely blank to begin with. Look at homework 26.
  6. Multiple Regression - the table of coefficients is given. Look at homework 27.
    1. Give a conclusion based on the table of coefficient p-values.
    2. Decide which one variable you would keep or eliminate from the model.
    3. The Sum of Squares and one of the df is given, complete the ANOVA table.
    4. Write the null and/or alternative hypothesis for the ANOVA table.
    5. Find the value of R2 and/or adjusted-R2 from the ANOVA table.
    6. Find the variance of the response variable.
  7. Chi-squared goodness of fit test - the observed frequencies and claimed proportions are given. Look at homework 21.
    1. Find the expected frequencies.
    2. Give the number of degrees of freedom.
    3. Know the null and alternative hypotheses.
    4. The test statistic and/or p-value are given; determine if the test statistic lies in the critical region.
    5. Give the decision and conclusion.
  8. The sample size, mean, standard error, and critical values for a sample are given. Find the confidence interval for the mean. Find the standard deviation.
  9. Test for independence / contingency table - the observed frequencies are given.
    1. Find the probabilities of some events from the table.
    2. Know the null and alternative hypotheses.
    3. Find the expected frequency for one of the cells in the table
    4. Determine the degrees of freedom
    5. The test statistic and/or p-value are given; give the decision and conclusion.
  10. One way analysis of variance - summary information is given. Look at homework 22.
    1. Write the null and alternative hypothesis.
    2. Complete the ANOVA table
    3. Give a conclusion
    4. Find the pooled estimate of the variance
    5. Find the variance of the response variable
  11. Two-way analysis of variance. Look at homework 23.
    1. Complete the two-way ANOVA table
    2. Know the three null and alternative hypotheses being tested with the table
    3. Give conclusions based on results from the table
  12. The sample size, sum of the values, and sum of the squares of the values are given. Find the mean, variation, variance, and standard deviation for the sample.
  13. Make a picture to illustrate a hypothesis test. Be sure to completely label it.
  14. Write the claim using symbols. Define any subscripts that are necessary. Ten parts.
  15. The critical value(s) and test statistic are given. Identify the test as left tail, right tail, or two tail and give the decision.
  16. The population mean and standard deviation for a normally distributed population are given. Use the normal table to answer this question.
    1. Label the axes of the bell-curve and illustrate the 68-95-99.7 rule.
    2. Find the probability of an individual having a particular value.
    3. Find the score given the area to the left or right.
    4. Find the probability that the mean of a sample will have a particular value.



You may use a sheet of notes on this exam. Here are the guidelines for the notesheet.

You can only use your notesheet for 20 minutes. After that time, you must turn in your test whether or not you are done with it.

Points per problem

# 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Total
Pts 5 4 5 14 11 17 8 3 15 12 13 3 5 20 6 9 150