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In a battleground state, 40% of all voters are Republicans. Assuming that there are only two parties - Democrat and Republican, if two voters are randomly selected for a telephone survey, what is the probability that they are both Republicans? Round your answer to 4 decimal places.
Four customers in succession come into the store to order stereos. The retailer is interested in their preferences. List the possibilities for preference arrangements among the four customers.
What is the expected number of crimes that will be solved? What is the standard deviation?
What can one conclude about the librarian's hypothesis at a level of significance of .05?
The researchers claimed that of those who completed the program, 85% improved. What possible confounds can you identify in this study?
Discuss a recent research project undertaken in the last 3 to 5 years. What type of analysis was conducted? What decisions were made?
Find out sample standard deviation (s) of scores Gordon Golfer made on his last four rounds (determine to the nearest one tenth, or .1).
Determine the critical z values. Suppose that normal distribution applies. Right-tailed test; standard deviation = 0.04.
An alcohol awareness task force at Big-Ten university sampled 20 students after the midterm to ask them whether they went bar hopping the weekend before the midterm or spent the weekend studying
What is the best estimate of the average tread life for the entire population of these tires?
Find the test statistic value for testing the equality of proportion variances.
The χ 2 statistic from a contingency table with 6 rows and five columns will have:
In a large section of statistics class, the points for the final exams are normally distributed with a mean of 72 and a standard deviation of 9. Find the lowest score on the final exam that would qualify a student for an (A, B, C, D)
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