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1. Maureen's sister recommended soaking the air plants in a bowl of water once a week. Maureen's coworker recommended spraying the air plants with a mist of water every day. Maureen decided to test both ideas. First, she measured the initial weight of all four air plants. Then, for the next two months, she sprayed two of the plants with a mist of water each day. She watered the two remaining plants by soaking them in water once a week. Finally, Maureen measured the weight of the plants again and calculated the change in weight for each plant. Which of the following was a dependent variable in this experiment? a. the watering method used b. the change in weight for each plant 2. David grew ten eggplants on his backyard garden. He grew each plant in its own pot, and each pot was the same size and shape. David noticed that his plants did not grow many leaves, and he wanted to see if earthworms could help them grow more. To test this idea, David divided his ten plants into two equal groups. For one group, he added three earthworms to the soil in each pot. He did not add any earthworms to pots in the other group. Two months later, David counted the number of leaves on each of the ten plants. He compared the number of leaves on the plants in each group. Which of the following was a dependent variable in this experiment? a. the number of leaves b. the number of earthworms 3. Dr. X does a study with three groups of ten students each. Each group consumes a different amount of caffeine (high, medium, and low amounts). Dr. X then measures all of the students on how well they do on a concentration test. What is the independent variable in this study? a. the number of students in each group b. the levels of caffeine

1. Maureen's sister recommended soaking the air plants in a bowl of water once a week. Maureen's coworker recommended spraying the air plants with a mist of water every day. Maureen decided to test both ideas. First, she measured the initial weight of all four air plants. Then, for the next two months, she sprayed two of the plants with a mist of water each day. She watered the two remaining plants by soaking them in water once a week. Finally, Maureen measured the weight of the plants again and calculated the change in weight for each plant. Which of the following was a dependent variable in this experiment? a. the watering method used b. the change in weight for each plant 2. David grew ten eggplants on his backyard garden. He grew each plant in its own pot, and each pot was the same size and shape. David noticed that his plants did not grow many leaves, and he wanted to see if earthworms could help them grow more. To test this idea, David divided his ten plants into two equal groups. For one group, he added three earthworms to the soil in each pot. He did not add any earthworms to pots in the other group. Two months later, David counted the number of leaves on each of the ten plants. He compared the number of leaves on the plants in each group. Which of the following was a dependent variable in this experiment? a. the number of leaves b. the number of earthworms 3. Dr. X does a study with three groups of ten students each. Each group consumes a different amount of caffeine (high, medium, and low amounts). Dr. X then measures all of the students on how well they do on a concentration test. What is the independent variable in this study? a. the number of students in each group b. the levels of caffeine

College Algebra
College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter5: Systems Of Equations And Inequalities
Section: Chapter Questions
Problem 11P
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Please answer 1,2 and 3 subunits thank you!

1. Maureen's sister recommended soaking the air plants in a bowl of water once a week. Maureen's coworker recommended spraying the air plants with a mist of water every day. Maureen decided to test both ideas. First, she measured the initial weight of all four air plants. Then, for the next two months, she sprayed two of the plants with a mist of water each day. She watered the two remaining plants by soaking them in water once a week. Finally, Maureen measured the weight of the plants again and calculated the change in weight for each plant. Which of the following was a dependent variable in this experiment? a. the watering method used b. the change in weight for each plant 2. David grew ten eggplants on his backyard garden. He grew each plant in its own pot, and each pot was the same size and shape. David noticed that his plants did not grow many leaves, and he wanted to see if earthworms could help them grow more. To test this idea, David divided his ten plants into two equal groups. For one group, he added three earthworms to the soil in each pot. He did not add any earthworms to pots in the other group. Two months later, David counted the number of leaves on each of the ten plants. He compared the number of leaves on the plants in each group. Which of the following was a dependent variable in this experiment? a. the number of leaves b. the number of earthworms 3. Dr. X does a study with three groups of ten students each. Each group consumes a different amount of caffeine (high, medium, and low amounts). Dr. X then measures all of the students on how well they do on a concentration test. What is the independent variable in this study? a. the number of students in each group b. the levels of caffeine
Transcribed Image Text:1. Maureen's sister recommended soaking the air plants in a bowl of water once a week. Maureen's coworker recommended spraying the air plants with a mist of water every day. Maureen decided to test both ideas. First, she measured the initial weight of all four air plants. Then, for the next two months, she sprayed two of the plants with a mist of water each day. She watered the two remaining plants by soaking them in water once a week. Finally, Maureen measured the weight of the plants again and calculated the change in weight for each plant. Which of the following was a dependent variable in this experiment? a. the watering method used b. the change in weight for each plant 2. David grew ten eggplants on his backyard garden. He grew each plant in its own pot, and each pot was the same size and shape. David noticed that his plants did not grow many leaves, and he wanted to see if earthworms could help them grow more. To test this idea, David divided his ten plants into two equal groups. For one group, he added three earthworms to the soil in each pot. He did not add any earthworms to pots in the other group. Two months later, David counted the number of leaves on each of the ten plants. He compared the number of leaves on the plants in each group. Which of the following was a dependent variable in this experiment? a. the number of leaves b. the number of earthworms 3. Dr. X does a study with three groups of ten students each. Each group consumes a different amount of caffeine (high, medium, and low amounts). Dr. X then measures all of the students on how well they do on a concentration test. What is the independent variable in this study? a. the number of students in each group b. the levels of caffeine
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