# Module 5.docx - PSY230 Fall B 2020 M5 Assignment(30 points...

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PSY230 Fall B 2020 M5 Assignment (30 points) General instruction: 1. Complete the guided Practice Problem first, if you have not done so. It will help you become proficient in answering the questions in this assignment. 2. Check out the module, Assignment Guides , which demonstrates how to show the math/process work and provides instruction on essential procedures in Word and Excel, and APA formatting examples. 3. Use this Word document to fill in the answers to the questions. You must type out a clear answer to each question, even if the answer is also contained in the Excel file submitted to show work . Q1) Independent-Samples t Test (15 points total) In a cognitive psychology experiment, the researcher is interested in whether encoding condition has a significant effect on memory for a set of drawings. In encoding condition A, subjects are asked to name the object in each drawing; in encoding condition B, subjects are asked to name the color of each drawing. Then all subjects are tested on their memory of the drawings. Each recruited subject is randomly assigned to either encoding condition A or encoding condition B. Based on memory theories, the researcher hypothesized that condition A (object naming) would lead to significantly better memory compared to condition B (color naming), and she sets the significance level at α = .05 for a one-tailed test. Hint: You may remember a similar scenario in the previous assignment, but with a crucial difference. In the previous assignment, each subject is tested in BOTH condition A and condition B, while each subject here is tested in only ONE condition (either A or B). Subject ID Encoding A Subject ID Encoding B 1 87 13 85 2 80 14 80 3 78 15 76 4 76 16 77 5 86 17 86 6 77 18 68 7 83 19 85 8 82 20 79 9 91 21 89 10 90 22 85 11 95 23 82 12 83 24 80 a. What is the dependent (outcome) variable? What is the independent (grouping) variable?
b. Create the null and alternative hypotheses for this study, using both words and symbol notation.
PSY230 Fall B 2020 Note that the hypotheses should be directional. (1 point total: .5 for each hypothesis, both written and symbol notation need to be correct to earn the credit for each hypothesis) H 0 μ = 0, the null hypothesis is that the encoding has no significant effect on memory? H 1 - μ ≠ 0, the alternative hypothesis is that the encoding has a significant effect on memory?