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Average length of trout caught in Swanson lake is u=19.For a random sample of 51 fish caught the mean length was xbar=18.5 inches with estimated standard deviation s=3.2 inches. Do these data indicate that the average length of trout caught in Swanson lake is less than u=19 inches? Use the level of significance a=0.05
As the correlation coefficient increases from 0.85 to 0.88, do the points of the scatter plot move toward the regression line, or away from it?
In the graphical method, how do you know when a problem is infeasible, unbounded, or when it has multiple optimal solutions? Give a real-world example of when you could have an infeasible problem.
The number of defective components produced by a certain process in one day has a Poisson distribution with mean 20. Each defective component has probability 0.6 of being repairable.
Quality control studies for Leaky Jet Computer Printers show the lifetime of the printer follows a normal distribution with a mean of 4.5 years and a standard deviation of 0.85 years.
Choose a research article from your field.Write the five hypotheses that this study is testing.Write both the null and alternative hypotheses for each one.
A new company is manufacturing light bulbs. The CEO claims that the average light bulb lasts 260 days. A researcher selects 25 bulbs for testing. The sample bulbs last an average of 250 days with a standard deviation of 20 days.
Promotion occurs on average every 10 days in a large corporation. What is the probability that the next promotion will occur within:
Misery loves company. It is time for the PE (professional engineer's exam). The results of the national test were normally distributed around the mean score of 70.
An elevator has a design capacity of 2,560 pounds and a posted limit of 16 passengers. The weight of adults is approximately normal with a mean of 150 pounds and standard deviation of 20 pounds.
What is the probability that at least one of the new books is a commercial success?
A sample of 84 golfers showed that their average score on a particular golf course was 89.05 with a standard deviation of 3.47.
Provide an overview of the problem you identified. What are some research components that could be measured in order to address the research question or hypothesis you identified? How might a researcher obtain that information?
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