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A recent visit to a nursing home showed how many times nursing residents fell in the last 24 months. The data is 0,0,1,2,3,6,1,2,4,1,3,4,11,10,8,8,0,0,0,1.
How many residents had at least two falls in the last 24 months?
The Gallup organization contracts 2871 male university graduates who have a white collar job and asks whether or not they had received a raise at work during the past 4 months. What is the population of the study?
Give a 99% confidence interval for the mean increase in pay for all corporate CEOs.
A chi-square test of independence could be used to examine the relationship between overhead light preference (on or off) and glasses use.
Hoops. A basketball player has made 80% of his foul shots during the season. Assuming the shots are independent, find the probability that in tonight.
Using the Hypothesis Tests Two Sample file and a .05 significance level, test whether there is a difference in the mean salary for men versus women.
Show the total order and total storage costs from problem #8. Also show that a higher order quantity would not be preferred (show by example). Also show that a lower order quantity would not be preferred (show by example).
In a study relating the amounts of time required for room service delivery at a newly opened Radisson Hotel, 20 deliveries had a mean time of 24.2 min and a standard deviation of 8.7 min. The sample data appears to have a bell-shaped distribution...
Assume that this percentage is based on a random sample of 800 French people. Give a 95% confidence interval for the population proportion in France.
Pizza. A researcher tests whether the mean cholesterol level among those who eat frozen pizza exceeds the value considered to indicate a health risk.
a pair of dice is rolled 10 times. what is the probability that a sum of seven is observed at most three
(a) Model the policy bring the umbrella only when it rains" as a Markov chain by defining the state space and transition probabilities. (b) What percentage of the time is the employee going to be wet?
Find the probability that at most 5 defective bolts will be found in a box of 200 bolts if it is known that 2 per cent of such bolts are expected to be defective.
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