Bailey, Cox, and Springer (1978) used high-pressure liquid chromatography to measure the amounts of various intermediates and by-products in food dyes. The following table gives the percentages added and found for two substances in the dye FD&C Yellow No. 5. Is there any evidence that the amounts found differ systematically from the amounts added?

Sampling and Experimental Design: Here are a few basic definitions that set the stage for some of the terminology you use in sampling: Population All the people or items of interest that you are looking to make an inference for Sample A small subset of the population to observe data on - The sample must be unbiased and representative of the population for an inference to be made Statistic summary conclusion made about the sample Parameter summary conclusion made about the population Statistics in a 4 step process: 1. Identify a research objective a. The group of interest b. The characteristic you want to talk about 2. Collect information needed to answer the questions a. Design experiment b. Sampling units