Journal

Order Description Explain using practical examples what a null hypothesis is. 6.2. P value I Report a P value from a study you have come across recently and explain what it means in the context of that study. 6.3. P value II Watch this video and then comment on any one of the objections about the P value raised by the researcher to the editor of the journal. Link: https://www.youtube.com/watch?v=8-PzD26Wl4g&list=UUNe-0Ph1yZwYbfMrxzNdZng&index=9 6.4. P value III A researcher compares cure rates with two treatments (A & B) and finds that there is a higher cure rate with treatment A and reports a P value for the difference (p = .02). He then states "there is 2% probability no difference exists, and 98% probability it does." 6.4. A) Explain why this statement is incorrect and what you would consider the correct statement. 6.4. B) Can you conclude from the P value that treatment A is indeed better - why or why not? 6.5. Confidence interval I Report a confidence interval and P value from a study you have recently read. 6.5. A) Interpret the meaning of the confidence interval from this study. 6.5. B) What additional information did you get from the confidence interval over the P value? 6.6. Confidence interval Watch this video and assume that this was a comparison of cure rates for bed sores at 30 days using a 'standard' versus 'new' treatment in two studies - a study with a sample size of 100 per group and another with 50 per group. 6.6. A) Is there evidence to move from the standard to the new treatment? Explain in terms of statistical versus clinical significance. 6.6. B) Do the two studies contradict each other based on their P values? Why or why not? Link: https://www.youtube.com/watch?v=bt--Dy20V48 6.7. Practical significance Explain any one of the concepts depicted below with an example. Image: Module Q6.7