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A physician knows the probability that a patient will recover from a certain disease is 60% when treated with the current medication. To test the effictiveness of a new medication, he gives it to 12 patients having this disease and he decides to switch to the new medication only if at least 10 of these patients recover. Find the probability that he goes to the new medication if it is equally effective as the current medication.
the number of customers entering a store on a given day is poisson distribution with mean lambda 10. the amount of
The owner of a chain of ice cream stores would like to study the effect of atmospheric temperature on sales during the summer season.
A study to see how well marital dissolution was predicted by the personality scores of husbands and wives was published in the Journal of Personality and Social Psychology.
Compute Cohen's d to measure effect size for both test ( standard deviation 20 and 10) If the population standard deviation is 10.
an insurance company offers a policy for a 100000 in the case of death during a calendar year for its young customers.
What is the population? What values does the population distribution describe? What is this distribution? What values does the sampling distribution of x describe? What is the sampling distribution?
Income Trevor is interested in purchasing the local hardware/sporting goods store in the small town of Dove Creek, Montana.
Estimate the mean height to within 3cm with 95% confidence. Assume the population standard deviation is about 12cm. What sample size should she use?
Test the claim of the brewery about the mean volume equal to 32 oz. at the 0.05 significance level. It's your choice whether to use z or t.
the following data show the daily closing prices in dollars per share for a stock. period price 1 82.87 2 83.00 3
Wall Street securities firms paid out record year-end bonuses of $145,500 per employee for 2005 (Fortune, February 6, 2006). Suppose we would like to take a sample of employees at the Jones & Ryan securities firm to see whether the mean year-end b..
a survey reported that 70 of those responding to a national survey of college freshmen were interested in taking summer
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