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Suppose a simple random sample of size 50 is selected from a population with σ= 10. Find the value of the standard error of the mean in each of the following case (use the finite population correction factor if appropriate)
The population size is infiniteThe population size is N = 50,000The population size in N = 5000The population size is N = 500
The researcher in exercise decides to conduct the same study using a within - participates design to control for differences in cognitive ability.
If random samples of 36 download times are selected, what is the probability that the sample mean will be less than 0.84 seconds?
Create a bell curve chart that shows the number of men needed per day for a 10,000 man hour job. The start date is 1/1/2008 and the end date is 6/1/2008.
Pierre has a utility function for total asset position of u(x)=ln(x), His assets currently consist of $50,000 in cash and a rare violin he inherited from a rich uncle which is valued at $100,000.
Visits to Web sites. What kinds of Web sites do males aged 18 to 34 visit most often? Pornographic sites take first place, but about 50 percent of male Internet users in this age group visit an auction site such as eBay at least once a month. Inte..
A survey of 500 internet users found that the users were online an average of 6.5 hours a week with a standard deviation of 3.1 hours. If 49 internet users are randomly selected what is the probability that their average time online will be more t..
A jeweler at Tiffany & Company computes the value of the linear correlation coefficient for pairs of sample data consisting of Tiffany prices for gold wedding rings and the corresponding prices at a discount store.
What percent of healthy young adults has osteoporosis by the WHO criterion? Suppose that the standard deviation is the same as for young adults. What percent of this older population has osteoporosis?
Assuming a normal distribution, What is the z-score associated with the second quartile? If we wish to have 95% confidence interval, what would be the value of the confidence coefficient?
Clearly identify the independent and dependent variables you would study. Determine whether an independent-samples or related-samples t test is most appropriate and why. Generate the statistical null and alternative hypotheses.
In a large western university, 15% of the students are graduate students. If a random sample of 20 students is selected, what is the probability that the sample contains:
A mean life of 1800 hours and a standard deviation of 200 hours. Assume the life of these light bulbs follows a normal distribution. Find the probability that a single light bulb will have a life greater than 2000 hours.
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