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A social scientist believes that the average number of pages in a professional journal in social science has changed in the past few decades. In 1970 the average of all journals was 115 pages with a standard deviation of 10.4 pages. A sample of 45 current journals finds an average of 111 pages with a standard deviation of 12.4 pages. At o.o1, is the social scientist correct?
In August, Landmark Polling Company asked 600 Georgians how they were going to vote in the upcoming election for governor. They found that 40% were planning on voting for the Republican. In September, the same company surveyed 1500 Georgians and found that 51% were planning on voting Republican. Is there evidence to suggest that fewer people planned to vote Republican in August than in September? Assume all conditions and assumptions have been satisfied and test at the 5% significance level.
State the hypotheses
The number of UFO (Unidentified Flying Object) sightings per week in Roswell, NM is a random variable with the cumulative distribution function given below.
scores on an english test are normally distributed with a mean of 32.3 and a standard deviation of 7.3. find the 40th
Discuss how a Human Rights Approach may aid or obstruct the resolution of these three themes:
A 10 year study by the American Heart Association provided data on how age, blood pressure and smoking relate to the risk of strokes.
What is the probability of two of the children getting the disease? What is the probability of at least two of the children getting the disease?
Your assignment this week is to describe structural equation modeling in which you include: (a) a comparison of the first and second generation models of structural equation modeling and their related major assumptions,
Would you play this game if you wanted to make money? What do we expert the value of the results of the game to be?
an e-commerce web site claims that 6 of people who visit the site make a purchase. answer the following questions based
if z is a standard normal random variable then what is przgt-2.43? use four decimal places of accuracy.can you also
Develop the tools necessary to educate project participants and to evaluate project outcomes (surveys, questionnaires, teaching materials, PowerPoint slides, etc.).
Enrollment for the last four semesters had been 120, 126, 110, and 130. Develop a forecast of enrollment next semester.
Give an estimate of the difference in gender proportions that favored Commercial A. Also construct a large-sample 95% confidence interval for this difference.
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