1. For the following scenarios, determine whether or not they represent paired samples. Test scores for students in a biology class taught by Professor Quick are being compared to test scores in a different section of the biology class taught by Professor Quack.
Pulse rates for students at the beginning of class are being compared to pulse rates for the same students at the end of class.
The weights of 10-year-olds in 2009 are being compared to the weights of 10-year-olds in 1994.
2. To test reaction times, a computer program will display a red circle. When it changes to yellow, the users click the mouse as fast as they can. The program will then display the reaction time. Students want to compare reaction times between people using their dominant hand and nondominant hand on the mouse.
a. Suppose you had 20 subjects participating in this study. Describe how you would conduct this study with a paired design with repeated measures.
b. If you found a significant difference in reaction times, could you conclude that the hand being used caused the difference?

In a test for esp (extrasensory perception), the experimenter looks at cards that are hidden from the subject. each card contains either a star, a circle, a wave, a cross or a square.(five shapes) as the experimenter looks at each of 20 cards in turn, the subject names the shape on the card. when the esp study described above discovers a subject whose performance appears to be better than guessing, the study continues at greater length. the experimenter looks at many cards bearing one of five shapes (star, square, circle, wave, and cross) in an order determined by random numbers. the subject cannot see the experimenter as he looks at each card in turn, in order to avoid any possible nonverbal clues. the answers of a subject who does not have esp should be independent observations, each with probability 1/5 of success. we record 1000 attempts. which of the following assumptions must be met in order to solve this problem? it's reasonable to assume normality 0.8(1000), 0.2(1000)%30 approximately normal 0.8(1000), 0.2(1000)% 10 approximately normal srs it is reasonable to assume the total number of cards is over 10,000 it is reasonable to assume the total number of cards is over 1000