Psy 325 Statistics for Behavioral & Social Sciences

A group of 36 senior citizens living in an assisted living facility took a standard IQ test. The administrator of the home decides to do a t test to determine if the group's average IQ is significantly different from the average IQ of the general population. The population mean is 100, but the population standard deviation is unknown. Ho: There is no significant difference between the average IQ of the sample and the population average IQ. Ha: The average IQ of the group of senior citizens is significantly different than the population average IQ. Descriptive Statistics Question 1: Which kind of t-test should be used in this situation? One-Sample Independent Standard N Mean deviation Question 2: Does the hypothesis call for a one-tailed test or a two-tailed test? One-Tailed 36 103.83 Two-Tailed 9.337 t Test Question 3: How many degrees of freedom are in the problem? Type Answer P Mean difference Question 4: According to the p value, is this result statistically significant at the .01 level? 2.463 .019 3.833 Yes No