Anderson (2012) was interested in the effects of attention load on reaction time. Participants in her study received a dual-task procedure in which they needed to respond as quickly as possible to a stimulus while simultaneously paying attention to the sounds of spoken words. She recorded reaction time (in hundreds of milliseconds). What is the shape of the distribution of the collected data? Mean = 19.1, Median = 7, Mode = 17 O Positively skewed 0 More information is needed to determine the shape of the distribution 0 Normal distribution 0 Negatively skewed Imagine you want to use the independent-measures t statistic to test hypotheses about the mean difference between two treatment conditions. Which of the following options corresponds to the null hypothesis? 0 The null hypothesis states that there is no difference between the two population means (u1 = H2)- 0 The null hypothesis states that there is only a small difference between the two population means (M1 M2). 0 The null hypothesis states that there is only a small difference between the two population means (ul at H2)- 0 The null hypothesis states that there is no difference between the two population means (M1 = M2). Suppose you compute a one-sample t test to test a directional hypothesis at an alpha level of 5%. You find a critical t-value of 1.796. What was your sample size