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You would like to know if operating red-light camera can actually reduce the number of traffic violation. We know that the average number of tickets before the implementation of red-light camera on daily basis was 15. After a careful experiment, you find that the average number went down to 11 with a standard deviation of 3. Z statistics turns out to be 2.14. Interpret the finding here. Describe null hypothesis (Ho) and alternative hypothesis (Ha), the finding, and whether or not to reject Ho.
the texas corporation has four oil fieldsfour refineries andnbsp four distribution centers in the locations identified
What is the probability that the auto dealer will need to order more transmissions? You should take your calculations to 4 decimal places.
in an analysis investigating the usefulness of pennies the cents portions of 100 randomly selected credit card charges
The profit of a certain outdoor activity depends upon the number of hours of sun shine through the formula profit = 1000(1 - e-x110). Find the expected level of the profit.
Fifty-two percent of the students at a certain college are females. Five percent of the students in this college are majoring in computer science. Two percent of the students are women majoring in computer science. If a student is selected at rand..
For the successful development of space projects, robotics and automation will be a key technology. Autonomous and dexterous space robots can reduce the workload of astronauts and increase operational efficiency in many missions.
Explain the main differences among integers, rational numbers, real numbers, and irrational numbers. How are these used in everyday life? How would you explain the use of each to someone who did not know about the differences?
A jar contains 2 black marbles and 8 white marbles. If you randomly pick 2 marbles without replacement, what is the probability that you get one marble of each color?
Ten members of a fraternity take a statistics course. Here are their scores on the first exam in the course:
Describe the given data show a seasonal effect using moving average method. Describe the data which show a seasonal effect.
The accounting department at Weston reports that it takes two construction workers a mean of 32 hours and a standard deviation of 2 hours... Determine the z values for 29 and 34 hrs. What percent of garages take between 32 and 34 hrs to erect.
10.3% of students in statistics actually take the course because they want to. If two students are selected at random, find the probability that both took statistics because they wanted to.
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