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According to a poll conducted by American Express, 35% of people living in the United States use the Internet when planning their vacation.
a) To conduct a follow-up study that would provide 95% confidence that the point estimate is correct to within plus-or-minus 0.04 of the population proportion, how large a sample size is required?
b) To conduct a follow-up study that would provide 99% confidence that the point estimate is correct to within plus-or-minus 0.02 of the population proportion, how large a sample size is required?
Decision making under risk is the same as decision making under uncertainty because in both the probabilities are unknown.
Use differential calculus to find both sales volume at which revenue is maximised and the maximum revenue available from sales of product X.
Create the corresponding decision tree and make recommendations.
Determine z score corresponding to minimum height requirement and determine z score corresponding to maximum height requirement.
Using the first two digits of the measurement as your stem, construct a stem and leaf display of the data above.
What is the expected number of Republicans who will win office in the coming election?
What is the probability that separates the bottom 25 percent from the rest of the distribution.
In the last quarter of 2007 a group of 64 mutual funds had a mean return of 0.9% with a standard deviation of 5.2%. Consider the normal model N(0.009.052) for the returns of these mutual funds.
What type of error would result in that case? Respond to at least two of your classmate's postings.
Do you think this detection bias would strengthen or attenuate the association between vegetarian diet and learning disabilities? Defend your choice briefly.
Consider the following time plot of the values of variable Y for each month of a 60-month period. This plot displays
What is the probability that a randomly chosen eight-week old baby smiles between 2 and 18 seconds?
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