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Identify one flaw in your friend's experimental design other than extraneous variables and suggest a way of fixing it.
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- Each row should represent one of the treatments. The table should have separate columns for the dependent and independent variables. You can fill in the data table except for the dependent variable.What is a null hypothesis in experiments? How is a null hypothesis used in science experiments? Note: Provide an answer with 150-200 wordsThe 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.
- Which of the following statements BEST describes the concept of contamination in a randomized control trial? Question 6 options: The intervention group is exposed to treatments received by the control group The intervention group receives an intervention other than the intervention being implemented The control group is exposed to the treatment received by the intervention group The control group receives an intervention other than the intervention being implementedDefine the following prioritization techniques. 1. Multi-Voting Technique 2. Strategy Lists 3. Nominal Group Technique 4. Hanlon Method 5. Prioritization MatrixA 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 contaminated
- Do you think the way this issue was handled should be a model for future situations involving potential dangers that might arise from research methods or results?You are called to a hospital emergency department to investigate the death of an infant who was brought to the emergency department by paramedics, with CPR and advanced life support in progress. The parents are waiting at the hospital. How would you go about investigating this death (big, multi-factorial question)? What would you tell the parents? What information do you need to obtain, and from whom? As you address these points, please also discuss why various factors are important, and those that would make you think SIDS was a factor, or not.These are the group of answer choices a) B_F_, B_ff and bbF_ b) bbff only c) bbF_ only d) B_F and bbF_ e) B_F_ only f) B_ff and bbff
- You are asked to draw and explain the goal of the Meselson-Stahl (1958) Experiment as outlined in the classroom. You need to draw your own diagram and use short sentences to explain the steps and/or important points, deductions. Clearly state what happens at each step.page - Columbus State Uni X content/2622738/viewContent/50155728/View + Calculating the Value of Chi-Square Once you've defined the null hypothesis (and know what you're testing!), you can finally calculate the chi-square value based on your observed data and the expected distribution. There are many statistical software packages and free web-based applications that will automate the calculation for you, but it's important to understand the calculation to understand the meaning of the calculated value. Here, we'll walk through it using a calculation table. This is Mendel's historic data for the F2 generation of monohybrid cross for flower color. Recall that he expected to see in the F2 generation a ratio of 3 purple : 1 white. Chi-square calculation for data from a monohybrid cross with an expected 3 purple : 1 white ratio. Outcomes Observed (0) Expected (E) O-E (0-E)2 (O-E)²/E Purple White Totals 705 224 929 X²= The first step is to calculate the expected (E) values for purple and…What is the primary reason for randomizing group allocation in a randomized controlled trial (RCT)? Question 3 options: to create treatment and control groups of equal size to blind participants to their group allocation to evenly distribute known and unknown factors that may affect the outcome between groups to increase the treatment effect between intervention and control groups
