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A random sample of 1000 college students ages from 18-25 revealed that 234 voted for the American Idol. Similarly, 198 college students stated they voted in the 2006 midterm elections. At the 0.05 significance level, is there a difference in the proportions of students who voted for American Idol and those who voted in the 2006 midterm elections?
Define the decision rule. Calculate the value of the test statistic.
Determine relative frequency of X=4? Generate the cumulative frequencies.
Use Excel and determine the number of each type of person that will be needed to complete the job within the allotted time and at minimum cost.
The probability of contracting the kissing disease is .23 when one is exposed to a certain provocative environment. Sixty people are so exposed. What is the probability that no more than 10 are infected with this dreaded disease.
The 1996 GSS asked, "If husband in family wants children, but wife makes decision that she doesn't want any children. If standard error is 0.01429, determine the 96 % confidence interval for population proportion who would say yes.
Find the confidence interval for the mean price, μ, of all dealer sticker prices of new cars: for a confidence level of 90% in thousands of dollars:
Compute the mean of the distribution of the sample means and the population mean. What is true about the two values?
Suppose that 40% of cars in your area are manufactured in the United States, 30% in Japan, 10% in Germany, and 20% in other countries. If you randomly select 6 cars, what is the probability that two of them are Japanese?
Michelle is a counselor at the local crisis center. She wishes to determine if there is a relationship between the gender of an individual and the amount of alcohol consumed.
To test whether or not there is a difference between treatments A, B, and C, a sample of 12 observations has been randomly assigned to the 3 treatments.
In forestry there appears to be a correlation between the diameter of a tree at breast height and the totol height of the tree. For the following sample of ten white spruces first construct a scatter plot then find the correlation (r) between heig..
The Bureau of Labor Statistics says that baggage handlers, trash haulers, and coal miners are among the occupations having the highest risk of the debilitating injury or illness. For coal miners working over the course of a year, 3.60 injuries per..
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