question 4 please

Is planta this tirm AND alde MindeGro. On awerage, thene plants peotured as averagen of 21.2 decimals: (a) 0.31 (b) 2311 (c) 0.134 (d) 0.645 thire decinath: 3. The next year, Bob decides to up his game by growing tomatoes but this time with fertilizer. He grows 18 plants this time AND adds Miracle-Gro. On average, these plants produced an average of 21.2 tomatoes per plant with a sample SD of sfert=1.6. Look at the difference between the fertilizer and no fertilizer outcomes: xfertnofert. What is the lower bound of the 95\% CI for the difference between these two means, xfert=21.2 and xnofert=20 ? Use the unequal variance assumption. Remember that your SE equation uses sample variance s2, not sample SD s. Round your calculations to three decimals. 1 (a) 0.631 (b) 2.511 (c) 0.134 (d) 0.646 4. Why does it make sense to use the unequal variance assumption for the previous question? 5. What happens to the SE and the crit if we had used the equal variance assumption? Again, round to three decimals