Part A?

A math teacher is interested in how different types of rewards Will affect the amount of optional ( but helpful ) homework completed by students . She randanly assigns students to one of three groups ? . Extra credit - students receive extra credit for each Optional assignment submitted . . Praise - Students receive praise for each completed assignment . Control - students receive no award for each completed assignment At the end of the semester, she counts how many optional homework assignments each student completed The sample size ( n ) is is for each group . a ) what is the null hypothesis in symbols, ? 0 ) what is the alternative hypothesis in words ?' ( ) what is the If between ? d ) what is the dfwithin? e ) using the answers to c. and d., find the critical value of F in the F table with using an alpha level of .os, f ) Bela are some of the data , including the mean number of optional assignments completed by each group. complete the table Extra credit Praise control M = 20 w/ 212 12 IS source SS of MS Between 490 F - within Total 2512