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A doctor wants to estimate the mean HDL cholestrol of all 20 to 29 year old females. How many subjects are needed to estimate the HDL cholestrol within 3 points with 99% confidence assuming s=18.9 on an earlier studies. suppose the doctor would be content with 95% confidence. How does the decrease in confidence affect the sample size required?
If member of sales force submits the entertainment expense (dinner cost for four) of $190, must this expense be considered unusually high. Calculate and interpret z- score for each of six entertainment expenses.
The use of linear regression is a critical tool for a manager's decision-making ability. Please carefully read the example below and try to answer the questions in terms of the problem context.
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.
Connect the successive points by line segments to help see the pattern. Are there systematic effects of time remaining after we regress consumption on price?
Let the null hypothesis be the landlord association claim and the alternative hypothesis be the housing authority claim. Doe the data support the landlord's association claim? What would you report to the housing authority?
Wentworth Medical Center text
The newspaper has charged that your police department responds more slowly to 911 calls in poor neighborhoods than in more wealthy ones.
a builder claims that air conditioners are installed in at least 85 of all homes being constructed today in the city of
The quality control engineer for a furniture manufacturer is interested in the mean amount of force necessary to produce cracks in stressed oak furniture.
An independent researcher has decided to study variations in TV viewing habits among three American cities. She has managed to randomly sample households in Chicago, Atlanta, and Minneapolis and gather data on the daily "on" times for households o..
the equation for a regression line predicting the numbers of hours of tv watched by children y from the number of hours
Numbers of people who live in the north, both aboriginal and non-aboriginal. See an inconsistency here within the law. Their use of them - then why would we allow this?
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