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What if the number of debilitating network viruses detected in a day at the firewalls of an Internet service provider within a certain geographic region is fueling a possible management decision to upgrade the detection system. The decision will be made based on the results of the following data analysis. This mean number of network viruses detected in a day is 2.5. What is the probability that in any given day:
1) Zero network viruses will be detected?
2) Exactly one network virus will be detected?
3) Two or more network viruses will be detected?
4) Fewer than three network viruses will be detected?
Can you please explain and show me the work of how you came to the answers?
In what situations might you use probability as a manager to approach business-related problems? What are the advantages to using probability concepts in business decisions?
Suppose today's sample yielded a mean of $4.19 and a standard deviation of $0.10, create and interpret a 99% confidence interval for the population standard deviation. Assume the distribution of gas prices in the area follows a normal distribution..
A tube of Listerine Tartar Control tooth paste contains 4.2 ounces. As people use the tooth paste, the amount remaining in any tube is random.
Use the following data to write the normal equations of the linear regression between Y and X, and find the least squares regression.
He argues that the regression effect says people who perform very poorly in their previous job tend to perform well in their next job. Is this what the regression effect says? Explain.
An investment broker reports that the yearly returns on common stocks are approximately normally distributed with a mean return of 12.4 percent and a standard deviation of 20.6 percent.
You just saw an ad on television that states the majority of the population would vote to make smoking illegal. The poll that is referenced shows 53% of those asked supported making smoking illegal.
Researcher is interested in testing whether there are differences in mean between population one and population two.
To determine her blood pressure, Carolyn divides her day into three parts; morning, afternoon, and evening. She then measures her blood pressure at 4 randomly selected times during each part of the day. What type of sampling is used?
Why is effective sampling important when performing a hypothesis test? What could happen if your sample is not appropriate to your study?
Do the association between the sizes of the heads and bodies of the two species appear to be strong? Explain.
Agricultural researchers are studying three different ways of planting peanuts to determine whether significantly different levels of production yield will result.
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