A researcher was interested in comparing the effectiveness of 3 types of instructional materials for teaching 1 biology concept. The instructional materials included: using text materials, video materials, text + video materials.  25 10th grade Biology students were randomly assigned to each type of instructional material for a total of 75 students.  These 75 students were volunteers  recruited from an after-school program.  Students used the method for 1, 2-hour session and were then tested using a 20 item Biology exam. The researcher used random assignment. List 1 other method the researcher could use to control and reduce extraneous and confounding variables?

If a researcher reported an effect size (Cohen’s d)  comparing the difference between males and females on mathematics of -1.50, what would be your interpretation of the size of the effect?

For  the following statement that might be found in a test manual, indicate what type of evidence of MEASUREMENT VALIDITY is indicated by the statement. A panel of experts reviewed the 50 items on the math test and judged the items to be clearly written and covered the instructional objectives.

What is the dependent variable? The prediction of depression in adulthood from the number of traumatic events experienced by first-generation college students. in childhood.  

A study investigated the number of hours 9th grade students studied for a science exam  and 9th grade students’ performance on the final exam in science for 9th grade students. What is the dependent variable in the above study?

The Columbian Exchange only had a significant impact on conditions in the New World (North America, Middle America, and South America).  Locations in Europe were not significantly impacted by the exchange of agricultural goods.

In which of the following places would you be least likely to encounter subsistence farming?

Find  the sum of the following arithmetic sequence. 85 + 97 + 109 + . . . + 7717 TYPE YOUR WORK IN THE BOX BELOW.     NO WORK = NO POINTS                   NO CREDIT FOR GUESS & CHECK

Find  the sum of the following arithmetic sequence. 78 + 86 + 94 + . . . + 7598 TYPE YOUR WORK IN THE BOX BELOW.     NO WORK = NO POINTS                   NO CREDIT FOR GUESS & CHECK

Donna, Chris, and Austin have a total of $93 in their wallets. Donna has $7 more than Chris. Austin has 3 times what Donna has. How much do they have in their wallets? TYPE YOUR WORK IN THE BOX BELOW.     NO WORK = NO POINTS                   NO CREDIT FOR GUESS & CHECK a.  Clearly assign an algebraic expression to each person (use only ) b.  Write an algebraic equation modeling the problem  NO EQUATION = NO POINTS      c.  Solve d.  Clearly write out your answer(s).