Explain why is that the correct answer:____________________________________________________ 4.A scientist testing the effects of a new medicine that will treat anemia, a blood disorder, uses a sample size of 15 patients for a study. All of the patients are from the same large city, are of varying ages, and are male. Which of the following is an accurate statement regarding this investigation? A. Using a sample size of 15 people is too small. The investigation will not be a reliable and valid test of the medicine. B. Using a sample of people of the same gender always allows the scientist to obtain the most accurate data for the study. C. Using varying ages of people will add necessary data to this study, causing the investigation’s results to be informative and useful. D. Using a sample from the same city is necessary to allow the scientist to control for all other factors that may have an effect on the medicine’s effectiveness. Explain why is that the correct answer: ___________________________________________________ 5. Andy wants to know if heavier carts roll down a ramp faster than lighter carts. He has some carts with big wheels, others with small wheels, and wooden blocks to vary the carts' weight. Each block weighs the same, and he'll use the same ramp for each trial. Which three carts would be best for Andy's experiment? A. A, B, and D B. A, C, and E C. C, E, and F D. B, C, and D Explain why is that the correct answer: ____________________________________________________
Explain why is that the correct answer:____________________________________________________ 4.A scientist testing the effects of a new medicine that will treat anemia, a blood disorder, uses a sample size of 15 patients for a study. All of the patients are from the same large city, are of varying ages, and are male. Which of the following is an accurate statement regarding this investigation? A. Using a sample size of 15 people is too small. The investigation will not be a reliable and valid test of the medicine. B. Using a sample of people of the same gender always allows the scientist to obtain the most accurate data for the study. C. Using varying ages of people will add necessary data to this study, causing the investigation’s results to be informative and useful. D. Using a sample from the same city is necessary to allow the scientist to control for all other factors that may have an effect on the medicine’s effectiveness. Explain why is that the correct answer: ___________________________________________________ 5. Andy wants to know if heavier carts roll down a ramp faster than lighter carts. He has some carts with big wheels, others with small wheels, and wooden blocks to vary the carts' weight. Each block weighs the same, and he'll use the same ramp for each trial. Which three carts would be best for Andy's experiment? A. A, B, and D B. A, C, and E C. C, E, and F D. B, C, and D Explain why is that the correct answer: ____________________________________________________
fcat_nature_of_science_sc.8.n.1.1_packet.docx