A new sunscreen claims to be better at preventing sunburn then any existing brand on the market. To test this claim, students rub the new sunscreen on one arm and another brand on their other arm and stand in the sun for 4 hours. Write a hypothesis for this test. What is the independent variable? What is the dependent variable? List two (or more) ways to improve this experimental design.
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- A new sunscreen claims to be better at preventing sunburn then any existing brand on the market. To test this claim, students rub the new sunscreen on one arm and another brand on their other arm and stand in the sun for 4 hours.
- Write a hypothesis for this test.
- What is the independent variable?
- What is the dependent variable?
- List two (or more) ways to improve this experimental design.
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- Compare and contrast random and systematic experimental errors with specific examples either real or fictitious. Explain how these types of errors can be identified and reduced in an experiment.A business researcher is hired by a specialty retail firm. The retailer is trying to decide what level of lighting and what temperature they should maintain in its stores to maximize sales. Identify the independent variable and dependent variable in this case. How would the independent variable be manipulated to measure differences across the dependent variable. Include details about the experimental design including the experimental groups.What is the independent variable? What is the dependent variable? Suggest a control for this experiment?
- In the following experiment, what is the Independent variable and Dependent Variable? Dr. Honeydew would like to test the effect of chlorine on Beaker's hair color. To test this he pours heavily chlorinated pool water on the right side of Beakers head. To the left side of Beakers head he pours pure water. After doing this for several days, only the hair on the right side turns green.Dr. Vanier’s daughter Lexy thinks that the snacking habit alone does not cause weight loss. She believes that one needs to combine no snacking with the elimination of carbohydrates in their meals. Please explain how Dr. Vanier may test this hypothesis by describing the research design. Specify the independent variable(s), dependent variable(s), and the name of the design. Finally, describe what she needs to find (i.e., what type of effect and what it looks like) in the experiment to support her hypothesis. ( name the IV(s); 1name the DV(s); name the design; then explain the effect that will support the hypothesis)What is the difference between an independent and dependent variable. Provide an example of each from a hypothetical experiment.
- What is the main idea of pseudoreplication in a manipulative experiment? Give an example problem of pseudoreplication in a manipulative experiment and explain.The mean weight of loaves of bread produced at the bakery where you work is supposed to be 1 pound. You are the supervisor of quality control at the bakery, and you are concerned that new employees are producing loaves that are too light. Suppose you weigh an SRS of bread loaves and find that the mean weight is 0.975 pound. What are the appropriate hypotheses for performing this significance test? Ho : x = 1; H. : x < 1 where i = the sample mean weight (in pounds) of bread loaves produced at the bakery. Ho : u = 1; H. : µ < 1 where u = the true mean weight (in pounds) of bread loaves produced at the bakery. Ho : µ < 1; H, : H = 1 where u = the true mean weight (in pounds) of bread loaves produced at the bakery. Ho : u = 1; H. : p = 0.975 where u= the true mean weight (in pounds) of bread loaves produced at the bakery. Ho : u = 1; H. : u # 1 where u= the true mean weight (in pounds) of bread loaves produced at the bakery.What are some of the assumptions behind the logic of the experiment described in Figure 5.26?
- A well-designed experiment will contain both positive and negative controls. Which of the following is a false statement? Choose one from the following: (A) a positive control experiment is missing some of the components of the experiment and should give a negative result (B) a positive control experiment contains all of the components of an experiment and should give a positive result (C) a negative control experiment is missing the element being tested and should give a negative result (D) if there are multiple components of an experiment, there should be multiple negative controls (E) if a negative control experiment give positives results, it is likely that the experiment is contaminatedGive an example, real or hypothetical, of an experiment in which a dependent variable is affected by an independent variable.What is the independent and dependent variables? Also what are the controlled variables and the controls in this experiment?