chapter9

chapter9 - Self Assessment for Chapter 9 1 1. Click on...

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Unformatted text preview: Self Assessment for Chapter 9 1 1. Click on Begin Assessment button. 2. Scroll down to begin quiz. Self Assessment for Chapter 9 2 Use this experiment to answer quiz questions 1 through 7. 1. Hirsch and Johnston from the Smell & Taste Treat- ment and Research Foundation in Chicago believe that the presence of floral scent can improve a per- sons learning ability in some situations. To test this hypothesis, they set up an experiment in which each of 22 subjects completed 2 sets of three pencil and pa- per mazes, one set while wearing a floral scented mask and one set while wearing an unscented mask. Each subject wore a floral scented mask and an unscented mask and the order was randomized. The researchers measured the length of time it took each subject to complete the sets of mazes. (Data from EESEE.) Self Assessment for Chapter 9 3 What is the explanatory variable? The amount of scent. Presence or absense of the floral scent. Time to complete the pencil and paper mazes. Whether the subject was able to complete the mazes quicker while wearing the floral scented mask. 2. What is the response variable? The amount of scent. Presence or absense of the floral scent. Time to complete the pencil and paper mazes. Whether the subject was able to complete the mazes quicker while wearing the floral scented mask. Self Assessment for Chapter 9 4 3. What are the individuals? The masks (floral or unscented). The 22 subjects. The mazes. 4. The researchers incorporated control/comparison by giving each subject a floral scented and an un- scented mask. randomly assigning half of the subjects to wear a floral scented mask only and the other half to wear the unscented mask only. giving each subject two sets of mazes. Self Assessment for Chapter 9 5 5. The researchers incorporated randomization by randomly selecting the subjects to participate in the study. randomly assigning half of the subjects to wear the floral mask and the other half to wear an unscented mask. randomly assigning the order that each subject re- ceives the floral scented and unscented masks. 6. The researchers incorporated replication by using two masks. using 2 sets of mazes. using 3 mazes within each set. using 22 subjects. repeating the entire experiment a second time. Self Assessment for Chapter 9 6 7. If there is a statistically significant difference between the average times to complete the mazes while wear- ing the floral scented mask and the unscented mask, then the difference in average times to complete the mazes between the floral scented mask and the un- scented mask is too large to be due to chance alone. is too small to be due to chance alone. so large that we can reasonably attribute it to chance....
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chapter9 - Self Assessment for Chapter 9 1 1. Click on...

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