The following partially completed ANOVA table approximately matches summary statistics g...

The following partially completed ANOVA table approximately matches summary statistics given in the article “From Here to Equity: The Influence of Status on Student Access to and Understanding of Science” (Science Education [1999]: 577–602). The study described in this article attempted to quantify the effect of socioeconomic status on learning science. The response variable was “Rate of Talk” (the number of on-task talk speech acts per minute) during group work. Data were also collected on the variable socioeconomic status (low, middle, high) and the variable gender (female, male). The author allowed for an interaction between gender and status. Assume that there were 12 students at each status–gender level combination, for a total of 72 subjects.

a. Fill in the missing numbers in the ANOVA table.

b. Is there a significant interaction between status and gender?

c. Is there a difference between the mean “Rate of Talk” scores for girls and boys?

d. Is there a difference between the mean “Rate of Talk” scores across the three different status groups?