Interactive Statistics

Let's Do Ix 3.5 The Look of Salsa An experiment has been conducted to improve the overall look (appeal) of salsa made by a college campus Mexican restaurant. The manager wants to investigate the effect of chunkiness of the tomatoes and amount of peppers on the appearance rating. Four sizes of chunkiness of the tomatoes (small, medium, large, and extra chunky) and three pepper amounts (few, medium, a lot) will be used in the experiment. Five bowls of salsa will be made for each treatment combination and volunteer customers will be asked to score the jars of salsa on overall appearance. (a) Explain why this is an experiment and not an observational study. (b) For this experimental situation (i) The experimental units are (ii) The response variable is (iii) The factors or explanatory variables are How many levels are there for each factor? (iv) How many treatments are there? (v) How many experimental units are required for the experiment? (c) Make a design-layout table for this experiment