A workshop is designed to help students prepare for college algebra, and we want to evaluate its effectiveness. There are 10 college students with similar math skills selected in the study. The student take a test before they attend the workshop, then after they attend the workshop, they will take another test with the similar difficulty level. The data are collected and summarized as below. Perform an appropriate statistical inference to answer the research questions. Mean Standard Deviation Min Max Before workshop 75 6.2 68 84 After Workshop 83 7.2 72 88 Diff = After - Before 6 5.8 -1 12 (Please be aware that there might be more information than needed) (1) Use appropriate inference procedure to analyze the data. (if it is two independent sample t test, use pooled variance t test) (2) Based on your inference, what type of error could you make? Which of the following best describe the error you indicated? A. The workshop is actually effective, but we concluded it is not. B. The workshop is actually not effective, but we concluded it is.