What is the topic in statistics that is the most difficult ? Please be specific here. Saying “I don’t understand anything” or “I don’t understand module 7” are very vague and difficult for people to help with. Instead, try and narrow it down to something like “I am struggling computing Cohen’s d” or “I am struggling to determine whether we reject or fail to reject the null hypothesis
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What is the topic in statistics that is the most difficult ? Please be specific here. Saying “I don’t understand anything” or “I don’t understand module 7” are very vague and difficult for people to help with. Instead, try and narrow it down to something like “I am struggling computing Cohen’s d” or “I am struggling to determine whether we reject or fail to reject the null hypothesis.”
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- 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…You perform a chi-square test to compare observed and expected values and obtain a chi-square value of 9.4 with 3 degrees of freedom. What do you conclude? it is not likely that the difference between observed and expected values is due to random chance, since p>0.05 it is impossible to conclude anything from this information it is likely that the difference between observed and expected values is due to random chance, since p>0.05 it is likely that the difference between observed and expected values is due to random chance, since p<0.05 the experiment was done incorrectly and must be repeated it is not likely that the difference between observed and expected values is due to random chance, since p<0.05The following statements about the chi square test are correct. (Read each statement carefully. Select all of the statements below that are true (that you agree with). Leave any statements that are false (that you do not agree with) un- selected.) The null hypothesis infers that chance alone cannot account for the differences between observed and expected data. The null hypothesis infers that observed values are close enough to expected values. The lower the overall chi square value, the more likely the null hypothesis will be accepted. The higher the probability range associated with the overall chi square value, the more likely the null hypothesis will be rejected.
- Which of the following statement(s) is(are) true about meta-analysis?Person 1 Person 2 Person 3 Person 4 Person 5 Person 6 i Y; (0) 3000 2500 3000 1500 4000 5000 Y; (1) 4000 3000 2500 4000 5500 6000 D₁ 1 0 1 0 1 0 (a) Explain the "fundamental problem of causal inference." Using all of the potential outcomes in the table, what is the average treatment effect?A) If other factors are held constant, how does sample variance influence the likelihood of rejecting the null hypothesis and the measure of effect size (i.e. Cohen’s d)? B) Briefly explain what least square solution is.
- what is the Expectation and outcome of results, Logical interpretation of the dataand any errors?I'm having trouble finding the dependent and independent variables of this scenaro: Average IQ scores for young school children are known to be 100 (SD = 15). However, the literature indicates that children’s intelligence may be decreased if their mothers have German measles during pregnancy. Using hospital records, a researcher obtained a sample of n = 25 school children whose mothers all had German measles during their pregnancies. Do the data indicate that children born to mothers who had German measles during the pregnancy have significantly lower IQ scores than typical young school children?Why is variable operationalization important? Select all that apply. It allows you to confirm that a valid measurement approach was used. It allows you to calculate appropriate descriptive statistics. It allows others to measure a construct in the same way that you did. It allows you to determine the appropriate statistical tests (i.e., inferential statistics).
- Assume that a Chi-square test was conducted to test the goodness of fit to a 3:1 ratio and that a Chi-square value of 2.62 was obtained (Table value is equal to 3.84). Should the null hypothesis be accepted? How many degrees of freedom would be associated with this test of significance?Identify which one of the four types of validity: measurement validity, statistical conclusion validity, internal validity, or external validity-is it violated in each of the following scenarios? Explain your decision. After a successful Phase 3 clinical trial in which their new drug improved symptoms in children with asthma, the pharmaceutical company announced in a press release that it had developed an asthma drug that the whole family can use. As a test of intelligence, researchers administered a 40-question American history test to the study participants. The average Score was 15 correct out of 40, thus researchers concluded that study participants are not very intelligent.The confidence interval is reported as follows: Lower 95% CI < p < Upper 95% CI For this question you will be calculating the confidence interval but only reporting the Upper 95% CI using the Agresti-Coull Method. ( (you'll need to know the whole 95% CI for a future question) Do NOT use calculations from previous questions, this is a new scenario. In the Invisible Gorilla Experiment, 24 students were watching the video, only 7 noticed the gorilla. Calculate the 95% CI using the Agresti-Coull method, but only report the Upper 95% CI. Report your answer to 3 decimals.