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When calculating confidence interval estimates...how is the x and standard deviation calculated?
How to calculate one sided 95% confidence limits for a proportion.could you provide a formula ?
I know that 33 is the raw score of the 85th percentile. How do I determine the mean?
When would you use regression correlation at your place of employment, in your education, or in politics?
How do I do a Chi-Square test on unequal sample sizes?
How does altman build z-score? please send to my email the process of building this score!
The width of the interval without the finite population correction factor is wider than the confidence interval with the finite population correction factor.
A total of 150 households were asked if they had Internet access, of which 57 responded "Yes". Which of the following would represent a 98% confidence interval around this sample proportion?
If we assume that the download times are normally distributed, what percent of users will wait between 5 and 10 seconds for the homepage to download?
What are the key terms in a verbal hypothesis that signify whether you are conducting a one-tailed or two-test? Give an example and explain your answer.
What measure would you use and why? Make sure to provide enough detail about the situations so that others can understand your responses. Work as a correctional officer.
Brain cancer is a rare disease. In any year there are about 3.1 cases per 100000 od population. Suppose a small medical insurance company has 150000 people on its books.
Calculate the 95% confidence interval for the population proportion of patients who are successfully treated. (c) Write a sentence that correctly interprets this interval.
A random sample of 43 light bulbs has a mean life of 677 hours with a standard deviation of 90 hours. Do you have enough evidence to reject the manufacturer's claim?
In Dallas some fire trucks were painted yellow (instead of red) to heighten their visibility. During a test period, the fleet of red fire trucks made 143, 348 runs and had 20 accidents, while the fleet of yellow firetrucks made 135,035 runs and had 4..
Imagine that these results are disseminated to the general public through publication and media coverage. Write about one possible harmful consequence that these conclusions could have in the "everyday" world.
Assume that 60 percent of the voters in a particular region support a candidate. Find the probability that a sample of 1,000 voters will yield a sample proportion in favor of the candidate within 4 percentage points of the actual proportion.
Which statistical analysis technique should be used? What is the null hypothesis? Can an analysis be performed? Why or why not?
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