D. level of significance is to the test statistic. You performed a right tailed hypothesis test and your sample gave you a test statistic in the left tail. Which of the following is considered the appropriate next step in this hypothesis test? A. Fail to reject the null.
Introduction The purpose of the experiment was to understand and test the Hardy-Weinberg Theory and to make sure all five assumptions of the theory are met in the experiment. If the Hardy-Weinberg Theory was true than this indicates the population did not evolve. In the theory, it says that allele and genotype frequencies stay constant as long as evolutionary influences are not involved. We, as a group, had to test and observe how changes in allele frequencies affected the genotype frequency of a whole population. From there it would let us observe whether or not the population would evolve.
The first scenario utilizes quantitative research. This type of research uses traditional scientific method to measure and analyze evidence that yields numerical data or information (Polit & Beck, 2010). Quantitative research is allied with a positivist paradigm in which objectivity, deductive processing and generalization are employed. These methods are strengths of such research whereas the requirement of large sample sizes and the inability to answer moral or ethical questions are its weaknesses. On the evidence hierarchy, it is in the Level IIa category because it is presented as a single randomized clinical trial.
Questions: * 1a) How is a mental response different from a measure of reaction time? Describe how reaction time relates to mental response. Simply providing definitions for each term is NOT a sufficient response. * A mental response is different from a measure of reaction time because a mental response is the act of perceiving set information and reacting to the stimulus in order to provide what we perceive is a correct response, whereas reaction time is the time that elapses between a stimulus and the response to it. For example, in this experiment, the mental response was perceiving the probe item and determining if it was one of the numbers in the memory set, and deciding on which button to press that corresponded with whether or not the item was present or absent.
3. Research and experimentation help to support a theory or prove that it has no foundation. The threats to internal validity include, history, maturation, testing, instrumentation, statistical regression, differential selection and experimental mortality. The threats to external validity include, reactive effects of testing, self-selection, reactive effects of experimental arrangements and multiple-treatment interference. To control or eliminate these threats, controlled experiments are done.
Null Hypothesis (Ho): There is no effect (The thing we’re trying to find evidence against) (= or < or > ) Alternative Hypothesis (H1): There is an effect (Thing we’re trying to prove) The significance level is the probability that you will say that the null hypothesis is wrong when really it is correct (Type I Error) If p-value is less than 0.05, the null hypothesis is rejected 1. Decide what you’re trying to provide evidence for: (H1). 2. Then set up the opposite as the null hypothesis and find evidence to disprove the null hypothesis. LAB Results part 2: The p-value is less than 0.05, therefore, there is a significant difference in heart rate at minute 5 of exercise for 0.5 kp vs. 2.5 kp workload on the bike.
Answer | | | | | Selected Answer: | False | Correct Answer: | False | | | | | * Question 6 2 out of 2 points | | | The Hurwicz criterion is a compromise between the maximax and maximin criteria. Answer | | | | | Selected Answer: | True | Correct Answer: | True | | | | | * Question 7 2 out of 2 points | | | Using the minimax regret criterion, we first construct a table of regrets. Subsequently, for each possible decision, we look across the states of nature and make a note of the maximum regret possible for that decision. We then pick the decision with the largest maximum regret. Answer | | | | | Selected Answer: | False | Correct Answer: | False | | | | | * Question 8 2 out of 2 points | | | The chi-square test is a statistical test to see if an observed data fit a
Statistics about the actual population rather than the target population B. Non-response bias C. Inability to perform inferential statistics D. Probability sampling When every member of a population has the chance of being selected based on the probability, or frequency, of its representation in that population, you are using which type of sampling? A. Quota sample B. Census sample C. Convenience sample D. Random sample Which of the following statements is NOT true? A. Estimating parameters is an important aspect of descriptive statistics. B.
How does measurement of Assessments differ under Common Core as opposed to Content Area Standards? Barbara Jacobs St. Thomas University First Component: Research Question How does measurement of assessments differ under common core as opposed to content area standards? Second Component: Base of Predictions What you already know or assume to be true regarding your question. How does measurement of assessments differ under common core as opposed to content area standards? We measure to obtain information about what is.
Caroline Cashion Question #1 * A hypothesis is a proposition to be tested, or a statement of a relationship between two variables. Hypothesis testing uses quantitative research and is concerned with describing cause and effect relationships. The ultimate goal for researchers in hypothesis testing is to provide evidence that a particular independent variable has a causal relationship with a particular dependent variable. The independent variable is a concept or construct that is believed to produce some measurable response or outcome (Jensen 211). A hypothetical theoretical construct would make a prediction about the links between two variables, and then set out to discover if their prediction holds true.