Question 3: Answer the following questions. (3 points) a. Explain the Hidden replication with example? b. When Split plot is used? c. A student used Minitab to analyze her results, however by mistake the letters showing significant differences using LSD for salt were lost. Can you help her by recalculating LSD for salt manually and put the letter in the table (Red box)? WORKSHEET General Linear Model: DW versus Rep, Salt, Extract Method Factor coding 1-1,0. - 1) Factor Information Factor Type Levels Values Rep Fixed 41.234 Fixed 512343 Extract Fixed 212 analysis of Variance Source OF Adl SS AdjMS F-Value P.Value Rep 3 00775 0.02583 0.06 0979 4.5955 1.14809 2.77 0:054 0.0322 0.03820 0.764 4 43193 1,07995 260 0.058 27 11.1957 0.41480 Total 39 20.2307 Model Summary 5 R-B R-eglad)) R-sglared) 1 624052 64.64 20.04% 0:00%