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Question: Suppose as part of your job you are responsible for installing emergency lighting in a series of state office buildings. Bids have been received from four manufacturers of battery-operated emergency lights. The costs are about equal, so the decision will be based on the length of time the lights last before failing. A sample of four lights from each manufacturer has been tested, with the following values (time in hours) recorded for each manufacturer:
Type A Type B Type C Type D
1,024 1,270 1,121 923
1,121 1,325 1,201 983
1,250 1,426 1,190 1,087
1,022 1,322 1,122 1,121
Using α = 0.01, what conclusion for the four manufacturers should you reach about the median length of time the lights last before failing? Explain.
Given the following data, create a scatter diagram (using Excel), click on the points as demonstrated in the Excel workbook, and have Excel place the regression equation and coefficient of correlation on the graph for you. Interpret the results (i..
Is there any statistically significant difference in how the drugs perform? If so, explain the effect. Use the post hoc tests as needed.
Suppose the student does not walk to school. What is the probability that the student carries a lunch?- If the student buys lunch, how did he or she most likely get to school?
Suppose that a quarter is randomly selected, what is the probability that this quarter has high productivity growth and has a large pay increase?
find the value of t for the difference between two means based on an assumption of normality and this information about
Two astronomers are discussing supernovas. Dr. Frank says, "Research has established that if a supernova occurs within ten light-years of the Earth, then life on Earth will be destroyed."- If so, what can we determine about the occurrence of a supe..
It has been reported that 3% of all cars on the highway are traveling at speeds in excess of 70 mph. If the speeds of four random automobiles are measured via radar, what is the probability that at least one car is going over 70 mph?
Topic 1. Provide a brief description of one of the following staff issues in correctional facilities (gender/staffing, stress, safety, satisfaction, or professionalism). Why is this an issue?
Set up a scatter diagram. Use the least-squares method to find the regression coefficients and State the regression equation.
Acetaminophen is an active ingredient found in more than 600 over the counter and prescription medicines, such as pain relievers, cough suppressants, and cold medications.
Lavanya is leading a virtual team that is given the task of developing a requirements document for a new application system. She will present a draft of the initial document but needs additional input on requirements form other team members who ar..
If your data meet the assumptions of the parametric test, why is it preferable to use the parametric test rather than the nonparametric alternative?
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