In the formula that computes a t-value, what does X _1 represent? Group of answer choices the variance for Group 1 the mean for Group 1 the number of participants in Group 1 the standard deviation for Group 1 Flag question: Question 7 Question 74 pts The T.TEST function in Excel computes which of the following? Group of answer choices the z-value the t-value the likelihood that the z-value is due to chance the likelihood that the t-value is due to chance Flag question: Question 8 Question 84 pts A simple analysis of variance is used to study participants who are tested ______. Group of answer choices twice or more only once once or more only twice Flag question: Question 9 Question 94 pts Which major assumption of the t-test deals with the amount of variability in each group? Group of answer choices scores are independent variances are equal sample chosen at random variables normally distributed Flag question: Question 10 Question 104 pts In order to compute the test statistic, or t-value, you must first approximate the sample size by calculating the ______. Group of answer choices mean score standard deviation pooled variance degrees of freedom