1. Experimental Design

2. Your mission… For each of the following experiments write: 1.The independent variable 2.The dependent variable 3.A problem question/statement 4.A hypothesis 5. Control group

3. Experiment #1: Ice cream The school has decided to make an ice cream bar during lunches for students. To decide what flavors they should buy they took a poll. They asked students which flavor is their favorite out of the following: cookie dough, peanut butter cup and rocky road. They also took data on the original flavor, vanilla.

4. Ice cream Answers 1.The independent variable- different types of ice cream 2.The dependent variable- amount of students who like the flavor 3.A problem question/statement- What is the effect of the different types of ice cream on the amount of students who like the ice cream flavor? 4.A hypothesis- If the type of ice cream is chocolate chip cookie dough then the amount of students who like the ice cream flavor will be greater than the other flavors. 5. Control group- The original flavor (vanilla)

5. Experiment #2: Rock Salt Deldot has been trying to determine the optimum rock salt amount to put on back roads to melt snow and ice.

6. Rock Salt Answers 1.The independent variable- different amounts of rock salt 2.The dependent variable- amount of snow or ice melted 3.A problem question/statement- What is the effect of the different amounts of rock salt on the amount of snow or ice melted? 4.A hypothesis- If the amount of rock salt is increased then the amount of snow or ice melted with increase. 5. Control group- No rock salt

7. Experiment #3: Racing Dodge Caliber SRT4, Chevy Cobalt SS Turbo, and Madzaspeed3 are racing on a one mile track. When the cars reach the end of the track their time is recorded.

8. Car Experiment Answers 1.The independent variable- Different types of cars 2.The dependent variable- the time it takes to go down the track. 3.A problem question/statement- What is the effect of the different types of cars on the time it take to go down the track? 4.A hypothesis- If the type of car is the Cobalt SS Turbo then the time it takes to go down the track will be faster than the other cars. 5. Control group- No car/non sport car…ex. Generic sedan like a toyota camry

9. Experiment #4: Sport Spectator Delcastle has been wondering what sport has the most spectators. The principals went out and counted spectators of football, basketball, baseball/softball, and soccer. They also polled the student body to see what students have never been to any sporting event.

10. Sport Spectator Answers 1.The independent variable- different types of sports 2.The dependent variable- the amount of spectators 3.A problem question/statement- What is the effect of the different types of sports on the amount of spectators? 4.A hypothesis- If the sport is football then the amount of spectators who come to see the sport will be greater than the other sports. 5. Control group- students who have not gone to any sports event.

11. Let’s Talk Constants… Remember we can only change one variable at a time during an experiment (the independent variable.) What things must we be sure are kept constant during each of the previous experiments?

12. Writing a conclusion to an experiment… A conclusion is how you will share the overall results of your experiment. Every conclusion needs to have the following FIVE items… 1.The PURPOSE of the experiment 2.The HYPOTHESIS 3.What the data showed (results statement) 4.Data (numbers) to support the results statement. 5. If the data supported, did not support, or was not clear about the hypothesis.

13. Writing a PURPOSE… Use the formula: The purpose of the experiment was to determine the effect of the (I.V.) on the (D.V.).

14. Prank Experiment The science department likes to play pranks on one another to make the working days go by faster. The teachers who participated in this experiment are: Mr. Bohl, Ms. Webb, Mrs. Nowak, Mr. Madigan, Mr. Hailey, and Ms. Saladyga. Mrs. Ness chose to not participate. The number of pranks tallied was totaled at the end of the school year.

15. YOUR MISSION….. For each of the following experiments write: 1.The independent variable 2.The dependant variable 3.A problem question/statement 4.A hypothesis 5. Control group

16. Prank Experiment IV- different teacher’s participating DV- The amount of pranks Problem Question- What is the effect of the different teacher’s participating on the amount of pranks administered by each teacher? Hypothesis- If the teacher is Mr. Madigan the amount of pranks administered on the other teachers will be the greatest. Control Group- Mrs. Ness who did not participate

17. The Data TeacherNumber of Pranks Mr. Bohl113 Ms. Webb47 Mrs. Nowak23 Mr. Madigan126 Mr. Hailey111 Ms. Saladyga121 Mrs. Ness0

18. YOUR MISSION…. Write the conclusion for the prank experiment. Every conclusion needs to have the following FIVE items… 1.The PURPOSE of the experiment 2.The HYPOTHESIS 3.What the data showed (results statement) 4.Data (numbers) to support the results statement. 5. If the data supported, did not support, or was not clear about the hypothesis.

19. Prank Experiment Conclusion The purpose of this experiment was to was to determine the effect of the different teachers on the amount of pranks produced by each teacher. My hypothesis was if the teacher is Mr. Madigan the amount of pranks administered on the other teachers will be the greatest. The data showed the Mr. Madigan did produce the most pranks. Ms. Saladyga came close to Mr. Madigan with 121 pranks. Mr. Bohl and Mr. Hailey were neck in neck with 113 and 111 pranks but Mr. Madigan won with 126 pranks. The data supported my hypothesis.