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If 70 percent of a target market sample of 80 people are aware of a brand name, the standard error of proportion for this study is approximately
A University of Omaha is concerned that out of state students may be receiving lower grades than in state students. Two independent random samples have been selected: 165 observations from population 1 (Out of state students) and 177 from population ..
an inspector correctly identifies defective products 90 of the time. for the next 10 products the probability that he
A die is loaded in such a way that the probability of each face turning up is proportional to the number of dots on that face. What is the probability of getting an even number in one throw?
One of the herpetologists fears that pollution might be affecting the natural growth of the pythons. Do you think this sample result is unusually small? Explain. Show work.
q1. a researcher wants to determine the sample size necessary to adequately conduct a study to estimate the population
a popular flashlight that uses two d-size batteries was selected and several of the same models were purchased to test
At the time she was hired as a server at the Grumney Family restaurant, Beth Brigden was told, "You can average at least $20 a day in tips." Over the first 35 days she was employed at the restaurant
A traffic study at one point on an interstate highway shows that vehicle speeds are normally distributed with a mean of 61.3 mph and a standard deviation of 3.3 mph.
sat i scores around the nation tend to have a mean scale score around 500 a standard deviation of about 100 points and
A study was conducted with 35 people that resulted in a mean of 22.1 minutes with a standard deviation of 1.9 minutes. Using a .05 significance level, test the claim that the mean amount of time relief will be felt is less than 25 minutes.
A sample of 64 statistics students at a small college had a mean mathematics ACT score of 28 with a standard deviation of 4. Estimate the mean mathematics ACT score for all statistics students at this college. Give the 95% confidence interval.
Compute the expected value of perfect information. Do you think it would be worth trying to obtain additional information concerning which scenario is likely to occur?
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