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Suppose that two populations have the same variance \sigma2 but are of different finite sizes. Population One has size 4,001 and Population Two has size 400,001. A random sample of size n = 101 is picked. Compare the difference in the widths of the two confidence intervals for their means.
Find the 90% confidence interval fo the mean. Does the confidence interval interpretation agree with the hypothesis testing results? Explain.
Your current sales revenue in the new year is projected to be $505,000. Find the indifference point (the break even point of sales revenue at which the fixed rent and variable rent for a year are the same). Explain which alternative you would acce..
An investment project is expected to earn $100,000 on average with a standard deviation of $50,000. Assume earnings from this investment project is a normal distribution. Of the next 15 people that invest in this project, what is the probability t..
Test the claim that the mean body mass index (BMI) of men is equal to the mean BMI of women. Use the data to the right to test this claim.
A new speed limit will be initiated such that approximately 10% of vehicles will be over the speed limit. What is the new speed limit based on this criterion? In what way do you think the actual distribution of speeds differs from a normal distribu..
Research has shown that losing even one night's sleep can have a significant effect on performance of complex tasks such as problem solving ( Linde & Bergstroem, 1992).
an economic theory is that the money flowing in and out of mutual funds fund flows is related to the performance of
researchers claim that herbal supplements such as ginseng or ginkgo biloba enhance human memory.to test this claim a
Joes Trucking provides shipping service from the outlying areas of New York City to a known distribution point within Manhattan. To understand the number of trucks required for a given service level agreement defined by a guaranteed delivery i..
Record the type of research design used. True lab experiment, quasi-experiment, field experiment, or correlation design.
One group is given the new drug and the other group is given the standard drug. Data are recorded on the effects of each drug. Is the research division using dependent or independent samples? Why?
At.05 level of significance test to find out if number of breakdowns is independent of shift.
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