Researchers developed an online predictive content tool to help people write emails. A follow up study measuring times it takes people to use emails was conducted. Suppose three different groups were randomly selected and assigned to the following conditions: Control Group: no predictive content tool Self-Paced Group: Predictive tool added with no instructions Course-Guided: Predictive tool added with short tutorial on how to get the best use from the tool The means and standard deviations of the resulting mean times spent per email from this hypothetical study are summarized below: n x s Group 1 (control) 31 18.2 2.7 Group 2 (self-paced) 30 17.5 1.7 Group 3 (course-guided) 32 12.6 1.5 Question 4 of 9 Question 4 This is not a form; we suggest that you use the browse mode and read all parts of the question carefully. If we let 1, 2, and 3 be the mean fluency scores for groups 1, 2, and 3 respectively, the appropriate hypotheses in this case are: Ho:1=2=3Ha:123 Ho:123Ha:1=2=3 Ho:1=2=3Ha:1, 2, 3 are not all equal Ho:1, 2, 3 are not all equalHa:1=2=3