 # Pt1420 Unit 4 Paper

Good Essays
Part I
Which of the concepts in these chapters was the most difficult for you? In 5-7 sentences, explain what you think you understand and ask 2-3 questions about things you know you don 't understand. Standard error of the mean
I read the section on standard error of the mean (SEM) three times and unfortunately, this concept is difficult for me to understand. I do understand that the standard error of the mean is the standard deviation of a sampling distribution of means. I understand how to calculate the SEM (simply divide the standard deviation of the sample by the square root of the sample size minus one). I understand that SEM is not the same as standard deviation. I also recognize that if the sample size is increased, the standard error of the
What is the 68-95-99.7 rule for normal distribution and how is it relevant?
2. What is the purpose of SEM and when is it applied?
While researching this concept, my understanding is that SEM is used to measure the accuracy with which a sample represents a population, is this interpretation correct?
3. Are we required to calculate the SEM in our own research?

Inference Techniques
The textbook gives a great breakdown of each inference technique and provides detailed explanation of when it is acceptable to use a given technique. I understand the concepts, analysis of variance (ANOVA) and analysis of covariance (ANCOVA) in particular. I have seen both of these terms mentioned in numerous research articles but I never understood why researchers applied the technique to their study.

Part II
We will review your postings and answer your questions and clarify/correct anything that needs correcting.

Part III
Create one multiple choice test question, either from your own topic or one of your classmate 's topics. Provide 4 answers. Tell me why the correct answer is correct and why the incorrect answers are incorrect.

1. This occurs when a researcher fails to reject a null hypothesis that is