(Solved): 1. Independent random sample from two normally distributed populations gives the result bellow. 1. ...

1. Independent random sample from two normally distributed populations gives the result bellow. 1. Write the null and alternative hypothesis to test if there is a differences between two groups. (4 points) 2. Calculate the sp (pooled standard deviation). (5 points) 3. Calculate t-test statistic. ( 3 points) 4. What is $$df$$ (degrees of freedom) and tc at alph=0.05. (2 points) 5. Write decision rule and decision (4 points)