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According to a forestry database for a certain? country, 5027 forest fires were started in a recent? year, affecting 4,566,503 hectares of land. Of? these, 2312 were caused by? lightning, affecting 4,521,629 hectares of? land; 2610 were caused by human? activities, affecting 40,904 hectares of? land; and the remainder were of unknown origin. Determine the relative frequency distribution of forest fire causes for the year.
What proportion of the normal distribution is found in the following areas?- Between the mean and z = .21- Beyond z = .55- Between the mean and z = -2.01
1. Why is it important to collect data from more than one experimental unit or sampling unit when testing an hypothesis?
Assuming that the two events are independent , the probability that cost is kept within budget and the campaign sales is:
A large construction company wants to know the mean time required to complete a house's basement. How many houses must be randomly selected to
The amount of a particular biochemical substance related to bone breakdown was measured in 30 healthy women. The sample mean and standard deviation were 3.3.
Twelve cases of leukemia are reported in people living in a particular census tract over a 5-year period. Is this number of cases abnormal if only 6.7 cases would be expected based on national cancer-incidence rates?
What other information would you like to know to answer the question about salary equity between the genders? Why?
If the CEO's claim were true, what is the probability that 18 randomly selected bulbs would have an average life of no more than 260 days
A state insurance commission estimates that 13% of all motorists in its state are uninsured. Suppose this proportion is valid.
An emergency service wishes to see whether a relationship exists between the outside temperature and the number of emergency calls it receives for a 7-hour period. Find the equation for the least squares line
What is the probability that no requests for assistance are in the system? What is the average number of requests that will be waiting for service? What is the average waiting time in minutes before service begins?
Provide an explanation of a chi-square test. Why would you use the chi-square statistic? What type of data is used with chi square analysis?
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