The Everything Paper Timeline for Completion. Each step of the paper is due at 11:59 pm on the date listed below. Key Learning Objectives. Upon completion of this assignment, you should know how to:
PSYC 3530
Dr. Langley
Worksheet #2
due Sunday, February 11th
Respond to each of the questions by typing your answer in the corresponding answer box; the box will expand to accommodate answers of any length. Questions are based on Chapter 7 from Introduction to Statistics in the Psychological Sciences and the associated lectures from this week’s module. If a question has multiple parts, be sure to address each part in your response. Responses should be in complete sentences unless otherwise stated.
This assignment must be completed individually and in your own words, without any assistance or collaboration. Use complete sentences for all items except #1. Upload your completed document to the appropriate iCollege submission folder as a Word document or a PDF (not as a .pages file, for example).
List the 4 steps of hypothesis testing. (1 point)
| The four steps are state the hypotheses, find the critical values, calculate the test statistic and effect size, and make the decision. |
In hypothesis testing, a “probability value” is the probability of what? (2 points)
| The probability of an outcome given the hypothesis. |
Describe the distinction between statistical significance and practical significance. (2 points)
| Statistical significance is when the null hypothesis is rejected. The difference between practical significance and significance is a small effect can be highly significant if the sample is large enough. |
What is a Type I error? (1 point)
| A Type I errors when a significance test results in the rejection of a true null hypothesis. |
What is a Type II error? (1 point)
| When you fail to reject a false null hypothesis. This type of error is not really an error |
For Questions 6-7, refer to the paragraph below:
A researcher (and professor) is interested in studying whether seating location within the classroom is related to students’ grades. She creates two groups in her class by randomly assigning students to either sit in the front half of the classroom or in the back half of the classroom. She then compares students’ final grades at the end of the semester to see if there is a significant difference between the two groups.
Write the null hypothesis in verbal form. (1 point)
| There is no significance in final grades between students who sit in the back of the classroom and students that sit in the front of the classroom. |
Write the three possible alternative hypotheses (2 directional; 1 non-directional) in verbal form. (2 points)
| Directional: Students that sit in the front half of the classroom will have higher final grades at the end of the semester. Students that sit in the back half of the classroom will have higher final grades at the end of the semester. Non-directional: There is no significant difference to students that sit in the front half of the classroom and those who sit in the back half of the classroom in relation to final grades at the end of the semester. |
