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Problem: A doctor wants to estimate the mean HDL cholesterol of all? 20- to? 29-year-old females. How many subjects are needed to estimate the mean HDL cholesterol within 3 points with 99 % confidence assuming s=15.2 based on earlier? studies? Suppose the doctor would be content with 90 % confidence.
Does the decrease in confidence affect the sample size? required?
A? 99% confidence level requires?
A 90% confidence level requires?
An important idea in data interpretation is choosing which graph to use under which circumstances. Describe the benefits of different graphs for different sets of data:
Translate the following arguments into symbolic form and use the first four rules of inference to derive the conclusion of each. - Either we take recycling seriously or we will be buried in garbage.
is it possible to calculate distribution-free confidence intervals based upon the wilcoxon two-sample test? if so what
The random variable x is the number of houses sold by a realtor in a single month at the real-estate office. Its probability distribution is:
Draw a bar chart of market capitals (or total assets) in 2018 (in million Australian dollars) of 6 companies listed in ASX that trade in industrials
Estimate a range of values centered about the mean in which about 95% of the state per captia income taxes will fall.
Why is the standard deviation so large?- If it writes only two of these policies, what are the mean and standard deviation of the annual profit?
For the example in Section 5.3.1, y = 0 at x = 10, 20, 30, 40, and y = 1 at x = 60, 70, 80, 90. \a. Explain intuitively why for the model, logit(π) = α + βx.
This situation comes up especially when the Xi are [copies of] the same space, such as R with its usual topology. Then ITi Xi is the set of all functions from I into R, often called RI .)
Due to financial hardship, the Nyke shoe company feels they only need to make one size of shoes, regardless of gender or height. They have collected data on gender, shoe size.
Assume no dividends paid and the AAR and GAR are based on annual rate of returns. (round to the nearest $1 and show your answer like this $394)
Based on your personal intuition, do you think that the lottery system is fair to the poor and the uneducated? Why?
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