for the question below what parametric method should I use to answer?

please provide as much detail as possible

thank you

Pine bark is more expensive than green waste, and pine bark is also becoming harder to source. The long-term objective for the research project is to lower the production cost of potting mix by replacing pine bark with another medium. The focus of this first stage analysis is to determine if there is a pine bark and green waste mix that has the same performance as the 100 percent pine bark mix. As petunias (all plants) have a high water concentration, and the concentration varies with environmental conditions, the dry weight of the petunias is used as the most accurate measure of plant growth performance. The dry shoot mass measurements are in grams. There are five treatment levels: 100% pine bark; 75% pine bark and 25% green waste; 50% pine bark and 50% green waste; 25% pine bark and 75% green waste; and 100% green waste. There are six observations for every treatment level. The indexing in the data file is clear, and the data source can be referenced as UWA plant growth experiment. It is appropriate to use a parametric method for this question.

a comprehensive, structured analysis of the data to answer the question of interest. The analysis should follow the IMRD format and include a data plot; consideration of formal hypotheses; the reporting of summary testing results; and a short written summary of results, including any qualifying comments. For guidance on the way to structure your answer consult the ANOVA example answer. The data set is in the GreenWasteExperiment file.