Pergunta

Question 47 Serenity is conducting an experiment to measure soda pop consumption during hot days. She assigns everyone who arrives before noon to be in the control group and everyone who arrives after noon to be in the experimental group.In the context of experimental research, what is wrong with Serenity's study? the experiment is not ethical the experiment is deceptive Serenity has not used random assignment Serenity has introduced a confederate into the study Question 48 Marjorie conducted research to find out if people prefer buying eggs during the summer months rather than during the rest of the year. She found that people ate the same amount of eggs all year long, no matter when it was measured.What is the correlation coefficient of Marjorie's research? -1 .85 -.55 0 1 pts 1 pts
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AliceMestre · Tutor por 5 anos
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Question 47:<br />The correct answer is: Serenity has not used random assignment.<br /><br />Explanation:<br />In an experimental study, it is important to use random assignment to ensure that any differences observed between the control group and the experimental group can be attributed to the independent variable being manipulated, rather than other confounding factors. In Serenity's study, by assigning participants to the control group or experimental group based on the time they arrive, she is not using random assignment. This could introduce bias and make it difficult to determine if any differences in soda pop consumption are due to the time of day or other factors.<br /><br />Question 48:<br />The correct answer is: 0.<br /><br />Explanation:<br />The correlation coefficient is a statistical measure that indicates the strength and direction of the linear relationship between two variables. In Marjorie's research, she found that people ate the same amount of eggs all year long, regardless of the time of year. This indicates that there is no linear relationship between the time of year and egg consumption, and the correlation coefficient would be 0.
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