The Essentials of Statistics 3rd Edition by Joseph Healey

تمرين 1

For each of the following tables, calculate the obtained chi square. (Hint: Calculate the expected frequencies for each cell with Formula 10.2. Double- check to make sure you are using the correct row and column marginals for each cell. It may be helpful to record the expected frequencies in table format; see Tables 10.2 10.4, and 10.8. Next, use a computational table to organize the calculation for Formula 10.1; see Tables 10.5 and 10.9. For each cell, subtract expected frequency from observed frequency and then record the result in column 3. Square the value in column 3 and then record the result in column 4. Divide the value in column 4 by the expected frequency for that cell and then record the result in column 5. Remember that the sum of column 5 in the computational table is obtained chi square. As you proceed, double-check to make sure you are using the correct values for each cell.)