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How does random assignment work in a repeated measures design?

Regression to the mean is problematic in which of the following situations?

Use the following information and table to answer questions 38 and 39. To study the effects of physical discomfort on attention, Dr. Lopez conducted the following study: A group of participants were required to keep one hand submerged in cold water (52 degrees). Half of the participants kept their hand in the water for 2 minutes, and half of the participants kept their hand in the water for 4 minutes. In addition, half of the participants were given a placebo pill and told it would reduce the pain of the water (pain relief expected). The other half were given a placebo pill and told that it would have no effect (no pain relief expected). While their hands were in the water, participants were asked to watch a video where a ball is quickly passed between and underneath three cups. At the end of the video, participants were asked to indicate under which cup the ball could be found. The time (in seconds) it took for participant to pick the correct cup was recorded (as a measure of whether they were paying attention). The results are below.   Using factorial notation, what type of design is this?

Refer to the research study below to answer questions 7-12. Dr. Rem studies sleep and sleep disorders. She is curious as to whether falling asleep in front of a television set causes people to fall asleep more slowly than falling asleep without watching TV. She recruits a sample of 60 women and creates three conditions. All participants come to the sleep lab for three nights in a row and experience all three conditions. In the first condition (A), participants fall asleep in front of a television that is off. In the second condition (B), participants fall asleep in front of a television that is turned on to a 24-hour news channel. In the third condition (C), participants fall asleep in front of a television that is turned on to the same 24-hour news channel but is muted. Participants sleep in the same bed each night. With the use of an electroencephalograph (EEG; a physiological measure that measures electrical activity in the brain), the researcher measures how long it takes participants to fall asleep each night.   What is the independent variable?

Refer to the research study below to answer questions 26-29. Dr. Math wondered if children learn multiplication better if they are taught by a teacher wearing a shirt depicting a nice cartoon character rather than a shirt depicting a scary cartoon character. He randomly assigned students to one of two classes. In class A, Mr. Jackson wore a SpongeBob (nice character) shirt while teaching multiplication. In class B, Mrs. Samalez wore a Joker (scary character) shirt while teaching multiplication. All students then took a multiplication test. A suspicion probe indicated that students were unaware of the purpose of the study.   To make sure that the students thought SpongeBob was nice and the Joker was scary, Dr. Math could have _________.

Complete the following reactions by choosing the right reagent from the provided list. What is D? Your answer should be a number from 1 to 14

Which of the following is TRUE about within-groups designs?

Which of the following is NOT an intermediate in the following reaction?

Choose the right option for Step 2

At a constant temperature of 971 °C or 698 K, the value of the equilibrium constant K for this reaction is 1.84 x 10−2. At this temperature, which is favored, the reaction product or the reactant? In other words, does the equilibrium point lie closer to the products or reactants side of the reaction equation? Briefly justify your answer.