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A reporter took a simple random sample of 725 voters in a region that has a population of 12,457. He recorded that 338 of the persons polled favored Issue 1 on the ballot. Construct a 95% confidence interval for the proportion that favor the issue and then discuss what the reporter can and cannot say in his report. If you were the editor of a newspaper reporting on the results, what questions would you have of the reporter before you printed his story?
A professor of math refutes the claim that the average student spends 3 hours studying for the midterm exam. Which hypothesis is used to test the claim?
A business operates with 9 locations. Each year, each location is allotted an overtime budget based on the previous years' activity. The total overtime budget for all 9 locations is $10 million.
Solution throughout graphical method. Produced by a company linear programming model is used to describe the production schedule.
Let Y denote the number of students on his bus. Compute the expectations and variances of X and Y:
Student A and B took different statistics classes and 2 different finals. Student A had a score of 83 out of 100 and ranked 72 in his class. Student b scored 85 out of 100 and he ranked in the 70 percentile of his class.
Chocolate bars produced by a certain machine are labeled with 16.0 oz. The distribution of the actual weights of these chocolate bars is Normal with a mean of 16.1 oz and a standard deviation of 0.1 oz. A chocolate bar is considered underweight if..
What is the probability that a randomly selected vehicle's VMD will lie between 60,000 and 100,000 miles since its previous crash?
NCAA Basketball Tournament. Each year, 64 college basketball teams compete in the NCAA tournament. Sandbox.com recently offered a prize of $10 million to anyone who could correctly pick the winner in each of the tournament games.
A woman has n keys, of which one will open her door. (a) if she tries the keys at random, discarding those that do not work, what is the probability that she will open the door one her kth try?
Make up a scatter diagram with 10 dots for each of the following:
Evolutionary theories often, Emphasize that humans have adapted to their physical environment. One such theory hypothesis that:
What kinds of plots are useful in data screening? What can you do if your data do not meet the assumptions of your statistic?
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