Fertilizer: In an agricultural experiment, the effects of two fertilizers on the production of oranges were measured. Twelve randomly selected plots of land were treated with fertilizer A, and 7 randomly selected plots were treated with fertilizer B. The number of pounds of harvested fruit was measured from each plot. Following are the results. Fertilizer A 464 433 441 491 403 466 448 45'!I 43? 516 417 420 FertilizerB 362 414 412 398 382 377 393 Partlof3 Explain why it is necessary to check whether the populations are approximately nom'lal before constructing a confidence interval. Since the sample size is , it is necessary to check that the populations are approximately normal. '5an 13 Blank 1 Options - large - small PDF | \"g! u 1 Copyright c 2D21MGraw Hili rALEKSiB is a registered trademark oiALEKS corporation Part20f3 Following are boxplots of these data. Is it reasonable to assume that the populations are approximately normal? i::l 4 4 4 0 4 0 4 CI Cl 0 54 3 3 0 CI 0 4 O 4 0 4 It reasonable to assume that the populations are approximately normal. (Blank 1| Blank 1 Options - is - is not Part3 of3 Construct a 30% condence interval for the difference between the mean yields for the two types of fertilizer. Let \"1 denote the mean yield for fertilizer A. Use the "Fl-34 Plus calculator. Round the answers to one decimal place. The 80% condence interval for the difference between the mean yields for the two types of fertilizer is