You are testing the effect of a particular fertilizer on a plant's growth. Your control plants don't get fertilizer while your test plants do. What would be your hypotheses and the null hypotheses?
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- A. Why do we need to test the null hypothesis instead of just proving an alternative hypothesis? B. You are testing the effect of a particular fertilizer on a plant's growth. Your control plants don't get fertilizer while your test plants do. What would be your hypotheses and the null hypotheses?A team of researchers is interested in testing the amount of oxygen gas (O2) produced when the same species of plant is exposed to different colors of visible light. The research team has developed a hypothesis to test and designed experimental conditions to run. They have submitted the work to you for feedback and approval. Your job is to provide feedback concerning both the hypothesis and the experimental design. This will enable them to make the necessary changes to obtain approval for their research. The Team’s Hypothesis: The levels of oxygen gas will be higher for plants exposed to visible red light. How would you improve the hypothesis while also putting it into a proper hypothesis with an IF and THEN statement?Experiments usually have several controlled variables. These are variables that must be kept constant in all parts of an experiment. For example, if an experiment is testing the effect of sunlight on the growth rate of 5 seeds, the only variable that should change should be the amount of sunlight. All other variables should remain the same to ensure that sunlight is the only aspect affecting the results. The other variables, such as soil type, amount of water, type/amount of fertilizer, are the controlled variables. Looking back at the simulation experiment on the meteorite, describe two variables that should have been controlled.
- You are interested in determining the amount of fertilizer your lavender plants need to increase their growth. You get 5 pots of plain soil. You transplant one lavender plant into each pot and measure the height of the plant. You label each pot with letters A-E. A does not get any fertilizer, pot B gets 2mg of fertilizer, pot B gets 4 mg of fertilizer, pot C gets 6 mg of fertilizer, pot D gets 8 mg of fertilizer, and pot E gets 10 mg of fertilizer. For one month you water the plants the same amount and each plant receives the same amount of light. After one month you measure the plants again. The results of the experiment are below. A. Write a testable hypothesis for this experiment. B. Write a prediction based on your hypothesis. C. What is the dependent variable? D. What is the independent variable? E. Do the results support or refute your hypothesis? Results Pot Initial Measurement (cm) Final Measurement (cm) A 5.2…A scientist is studying the effect a new fertilizer has on the root growth of bean seedlings. Three groups of plants are grown in the same location in a greenhouse, each receiving the same amount of sunlight and water every day. The scientist measures the length of the roots for each plant every day. The scientist then calculates the mean for each group for five days. The results are shown in the following table. Fertilizer Experiment Data Table A What is the independent variable in this experiment? B с Day 1 Day 2 Day 3 Day 4 Day 5 D Group 1 0 mg 3.0 cm 3.2 cm 3.4 cm 3.7 cm 4.2 cm the amount of water given to each plant the amount of fertilizer given to each plant Group 2 5 mg 2.7 cm 3.1 cm 3.7 cm 4.2 cm 4.6 cm the place in the greenhouse where each plant was placed the type of soil used for each plant Group 3 10 mg 2.9 cm 3.3 cm 3.7 cm 3.9 cm 4.1 cmA scientist is studying the effect a new fertilizer has on root growth on bean seedlings. Three groups of plants are grown in the same location in a greenhouse, each receiving the same amount of sunlight and water every day. The scientist measures the length of the roots for each plant every day. The scientist then calculates the mean for each group for five days. The results are shown in the following table. Fertilizer Experiment Data Table Which are the controlled variables in this experiment? Select all that apply. A B Day 1 Day 2 Day 3 Day 4 Day 5 с D Group 1 0 mg 3.0 cm 3.2 cm 3.4 cm 3.7 cm 4.2 cm the number of days the experiment lasted the amount of fertilizer each plant was given the location the plants were grown in the type of fertilizer used by the scientist Group 2 5 mg 2.7 cm 3.1 cm 3.7 cm 4.2 cm 4.6 cm Group 3 10 mg 2.9 cm 3.3 cm 3.7 cm 3.9 cm 4.1 cm
- plants were grown using two differenc fertilizers and the number of flowers that each plant produced was counted. to test for a significant effect of fertilizer on the number of flowers at the 5% level significance, the calculated and the critical values were computed. type both the null and the alternative hypothesis for this test in the box below. use full sentences to describe both H0 and H1. (no mathematical terms in the answer)Jenny wanted to know whether the type of fertilizer she used affected how well her tomato plants grew. She wanted to test 3 fertilizers: Fertilizer A, B, and C. Jenny split up her garden into 3 sections and planted the same number of tomato plants in each section. When planted, all of the plants were the same height and all sections of the garden received the same amount of sunlight each day. Jenny used Fertilizer A in section 1 of the garden, Fertilizer B in section 2, and Fertilizer C in section 3 of the garden, ensuring that she used the same amount of fertilizer on each plant in each section of her garden. She watered the plants at the same time of day with the same amount of water for 3 months and then she measured how tall each of the plants in each section were. Which of the following is a confounding variable that could affect the results of the experiment if it is not controlled? Choose all that apply. Type of fertilizer |Amount of sun exposure Amount of fertilizer WateringA researcher was interested in finding out whether talking to plants was related to plant growth. To test this idea she used 20 plants where all 20 plants had the same amount of food, water and sunlight. She randomly assigned the 20 plants to 1 of 2 groups: she talked to 10 of the plants for 1 minute/day; she talked to the other 10 plants 10 minutes/day. Every day for one month the researcher measured the height of the plants. What is the Independent variable and the Dependent variable in the example above?
- Jenny wanted to know whether the type of fertilizer she used affected how well her tomato plants grew. She wanted to test 3 fertilizers: Fertilizer A, B, and C. Jenny split up her garden into 3 sections and planted the same number of tomato plants in each section. When planted, all of the plants were the same height and all sections of the garden received the same amount of sunlight each day. Jenny used Fertilizer A in section 1 of the garden, Fertilizer B in section 2, and Fertilizer C in section 3 of the garden, ensuring that she used the same amount of fertilizer on each plant in each section of her garden. She watered the plants at the same time of day with the same amount of water for 3 months and then she measured how tall each of the plants in each section were. There were no results presented in this simple experiment that Jenny conducted. But, which of the following are logical data or results that Jenny could have collected from the experiment? Choose all that apply.…Urkle decided he wanted to test the effects of watering his plants with cold coffee. For a week he watered one group of plants cold coffee. He ignored the other group of plants. Urkle has no idea what might happen to plants that receive coffee. What is wrong with Urkle's experimental design? If Urkle wants to test the effects of cold coffee on plant growth, he should water his control group with cold water. If Urkle wants to test the effects of cold coffee on plant growth, he should water the plants in the other group with Dr. Pepper. If Urkle wants to test to test the effects of cold coffee on plant growth, he should water the plants in the other group with hot coffee. If Urkle wants to test the effects of cold coffee on plant growth, he can ignore the control group as long as he makes sure both groups get the same amount of sun.A. Define null hypothesis in your own words. B. What is thr poiny of having a null hypothesis? C. What is the alternative hypothesis? D. Why do we need to test the null hypothesis instead of just proving an alternative hypothesis? F. You are t. Esting the effect of a particular fertilizer onba plant's growth. Your control plants don't get fertilizer while your test plants do. Whatvwould be your hypotheses and the null hypotheses?
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