"> tarleton.instructure.com C + 88 hw6.pdf & Download @ Info X Close - ZOOM + K7 PSYC 2317: Statistical Methods for Psychology Tarleton State University Unit 6 Homework 1. A random sample of N = 25 individuals is selected from a population with u = 25, and a treatment is administered to each individual in the sample. After treatment, the sample mean is found to be X = 27.2 with SS = 384. Based on the sample data, does the treatment result in a significant increase? 2. To evaluate the effect of a treatment, a sample is obtained from a population with a mean of u = 40 and the treatment is administered to the individuals in the sample. After treatment, the sample mean is found to be X = 41.3 with a standard deviation of o = 3. (a) If the sample consists of N = 16 individuals, are the data sufficient to conclude that the treatment results in a significant increase? (b) If the sample consists of N = 36 individuals, are the data sufficient to conclude that the treatment results in a significant increase' (c) Comparing your answers for parts (a) and (b), how does the size of the sample influence the outcome of a hypothesis test? 3. Standardized measures seem to indicate that the average level of anxiety has increased grad- ually over the past 50 years (Twenge, 2000). In the 1950s, the average score on the Child Manifest Anxiety Scale was u = 10.1. A sample of N = 16 of today's children produces a mean score of X = 18.3 with SS = 240. Based on this sample, has there been a significant change in the average level of anxiety since the 1950s? 4. A sample of N = 9 individuals participates in a repeated measures study that produces a sample mean difference of X = 4.25 with SS = 128 for the difference scores. Is this mean difference large enough to be considered a significant increase?tarleton.instructure.com C + 88 = SP22 - Stat Methods in Psychology PSYC-2317-050/... > Assignments > HW 6 4) Immersive Reader Spring 2022 HW 6 Start Assignment Home 2 Announcements Due Sunday by 11:59pm Points 10 Submitting a file upload File Types doc, docx, and pdf Grades Available until Mar 6 at 11:59pm Course Evaluations The assignment can be downloaded here & . You can either (1) hand write your solutions and scan to a PDF, or (2) write your solutions in Word / OpenOffice with a DOC or DOCX extension. Attach the file here and submit. NOTE: Make sure you are showing your work for the approximated standard deviation (unless given), standard error, t- ? score, and p-value (which includes calculator steps)