G A particular brand of diet margarine was analyzed to determine the level of polyunsaturated fatty acid (in percent). A sample of six packages resulted in the following data: 18.7, 19.2, 19.4, 18.8, 18.4, 19.0. (a) Construct a 95% PI for the fatty acid content of a single package of margarine. Round your answers to 2 decimal places. (b) Find a tolerance interval for the fatty acid content that includes 95% of the margarine packages with 99% confidence. Round your answers to 2 decimal places.

Agroup of student volunteers participates in a study designed to assess several behavioral interventions for improving output in a repetitive task. prior to the beginning of the study, all volunteers unknowingly observed, and their output is measured. at the beginning of the study, prior to any intervention, the volunteers perform the same task under the observation of a study administrator, and their overall output increases. which of the following terms describes this phenomenon? a. simpson's paradox b. hawthorne effect are d. novelty effect d. pygmalion effect e. observer-expectancy effect