1. Ho: H1 - H2 = 0 Ha: M1 - 12 # 0 To address the hypotheses above, data were collected from two large independent samples. Sample statistics are presented in the following table: Summary Statistics Group Sample Size Mean Standard Deviation Treatment 299 28.645 8.155 Control 301 27.118 7.994 Observations in both groups are slightly skewed to the left. Is it appropriate to use the t distribution to approximate the sampling distribution in this scenario? Yes, the t distribution may be used No, the t distribution should not be used 2. Ho: M1 - H2 = 0 Ha: M1 - M2 # 0 Researchers are planning to test the hypotheses above using the data summarized in the table below. In Group 1, the data are skewed to the left. In Group 2, the data are skewed to the right. Summary Statistics Sample N Mean StDev Group 1 18 10.448 6.857 Group 2 16 11.548 5.246 Which of the following procedures is appropriate? C Two independent means t test Randomization test