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1. In a study of brain waves during sleep, a sample of 29 college students were randomly separated into two groups. The first group had 15 people and were each given ½ liter of red wine before sleeping. The second group had 14 people and were given no alcohol before sleeping. All participants when to sleep at 11 PM and their brainwave activity was measured from 4-6 AM. The group drinking alcohol had a mean brainwave activity of 19.65 hertz and a standard deviation of 1.86 hertz. The group not drinking alcohol had a mean of 6.59 hertz and standard deviation of 1.91 hertz. Compute a 90% confidence interval for the difference in population means of groups drinking alcohol before sleeping and those not drinking alcohol before sleeping. Explain the meaning of the confidence interval.
2. A study comparing children's reading age (in months) was developed using identical twin toddlers. One set of 6 twins played for 2 hours each day with educational toys (experimental group), the corresponding set of 6 twins played for 2 hours each day with non-educational toys (control group). The mean difference in reading age between the experimental group and control group of 6 sets of twins was -2.33 months and the standard deviation of the sample difference was 2.16 months. Set up a hypothesis test to determine if there is a difference between the 2 groups and use the appropriate sample test statistic to determine if the difference in reading age is significant at the 5% level.
3. Discuss the following:
a. What type of data can be examined using the Chi-Squared Te
b. What is the only constraint in using Chi-Squared Tests?
c. What problems can be caused by the way the data have been grouped?
Which was not a feature of the mass society that emerged by the end of the nineteenth century?
What questions have come up for you at this point? Do you have any helpful tips that you've picked up in this course or in a past course?
List and briefly explain the purpose of at least three Supreme Court cases that led to the segregation of schools and the establishment of the separate but equal doctrine after the passage of Plessy v. Ferguson - 1896.
The employees are telling you that these benefits are provided by other companies in the area. Develop a plan of action for how you would respond.
describe qi and the importance of qi within taoism and how it relates to the tao. explain wu wei and the basic
What program is the poster advertising? Who is the programmed designed for and how is it funded? What comparison is being made by the image?
How liberal were the liberal tories?
What side (Axis, Allies, or neutral) did the country take in World War II? Why? What did they hope to gain (or keep from losing)?
Discuss the physical, social, and intellectual features of the earliest civilizations of Mesoamerica. Relate how their agricultural technology differed from that of Europe and Asia.
Analyze the rise of civilization in the Americas, Mesopotamia, Egypt, China and India, and Hebrew and Iranian civilization in the period 3500 BCE to 1000CE.
Describe the conquests of Alexander the Great and analyze the legacy of his empire. Be sure to mention his impact on Persia, India, and Egypt as well as the cultural implications of his conquests.
Discuss the origins and role of the NAACP during the pre and post segregation era. What riots erupted as a result of racial tensions during the Civil Rights era?
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