A study was designed as a randomized, controlled experiment to test the effectiveness of experimental online instruction compared to traditional in-person instruction (see Example 9.5 in BPS9e) in an introductory statistics course. Both were flipped classrooms where students studied the new content at home for a day. The next day, the experimental group was tested with 10 statistics exercises online and could access 10 video-recorded instructions/explanations from the instructor as needed. The control group took the same test the next day, but now the teacher who created the instructional videos was in the classroom and would offer help as needed. One hundred students volunteered for the study and their age was calculated from school records. The researcher was concerned that age could confound the experiment, therefore used block randomization to create two treatment groups that were presumably balanced on age. As students were recruited, the researcher assigned an intelligent ID number to each student where older students got an "odd" number" and younger students an "even" number.

Application Task

Your first task is to replicate the block randomization process. Open a blank EXCEL spreadsheet and label the first two columns: ID, TXGP. To create the ID variable, use the RANDBETWEEN function and enter two values (1000000 and 999999999). For the TXGP variable, use the RANDBETWEEN function with two values (0 and 1). Copy these two formulae and paste them until you get to row 101. Import the EXCEL file into Jamovi/Software. Compute a new variable called AGEGP with the MOD function. Now run a crosstab analysis by putting TXGP in the rows and the AGEGP in the columns. Click the "cell" option and select row percentages. Paste the crosstab into a Word document and answer the following four questions. (Report counts and percentages as whole numbers, no decimal places.)