Name Date PSYC 3402 HW Assignment 8 One sample z and t tests For each of the following problems, determine which test to perform and then calculate. Use steps I-4 for each. Problem 1: A researcher is interested in the affects that a person's avatar (i.c. visual representation of oneself) has on the number of profile views on Myspace.com. The distribution of individual personal profile views (excluding bands, artists, etc.) is extremely positively skewed with a mean of 230 views/day. The researcher creates 36 fictitious profiles that contain roughly the same information but the picture (avatar) is an animated gif of a smiling face (36 faces randomly selected from a compilation of faces judged to be of average attractiveness). The results showed that of the 36 profiles the average number of views was 250 with a standard deviation of 60. Does having an animated smile as an avatar elicit a different number of profile views than average! 1. State Hypotheses State Null Hypothesis Ho : p Alternative Hypothesis Hr : 8 2. Decide on a (usually .05) = Decide on type of test (distribution; z, f, etc.) (recall Central Limit Theorem). Cases of Central Limit Theorem: 1. Is the population normal: use = 2. Is the sample size large (n 2 30): use = Small sample (n