An engineer suspects that the surface finish of metal parts is influenced by the type of paint used and the drying time. He selected three drying times—20, 25, and 30 minutes—and used two types of paint. Three parts are tested with each combination of paint type and drying time. The data are as follows:
(a) State the hypotheses of interest in this experiment.
(b) Test the hypotheses in part (a) and draw conclusions using the analysis of variance with α = 0.05.
(c) Analyze the residuals from this experiment.
Research Methods in Social psychology Introduction ● “Why do stereotypes persist even in the face of contradictory evidence” ○ “Social psychology as the systematic study of the nature and causes of human social behavior” Objectives ● Key objectives of research ○ Describing reality ○ Identifying correlations between variables ○ Testing causal hypotheses and theories ● Core esearch methods ○ Surveys ○ Field studies and natur bservation ○ Archival esearch and content analysis ○ Experiments ● Potential risks to human research participants and how to
