why is it important to use a t test? how to measure variance of answers in a survey using default responses can you measure the difference between a population and a test sposs how to measure variance what is a t test used for in survey research what is used to measure the difference between answers in a survey what is a t test for spss what is the t test used in the spss test how to measure the differences of a survey what is the difference on a standard spss survey what is the test used to measure the difference in answers how do i find the difference between defaults in spss which test measures a sample's response to the default answers how do you measure response based on the default answers do defaults influence the answer in a survey? how to measure differences in response to surveys using defaults how to measure difference between survey answers how do i tell if people follow defaults in spss how to measure a difference between questions? spss how to test difference between different responses