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Each of seven dwarfs has his own bed in a common dormitory. Every night, they retire to bed one at a time, always in the same sequential order. On a particular evening, the youngest dwarf, who always retires first, has had too much to drink. He randomly chooses one of the seven beds to fall asleep on. As each of the other dwarfs retires, he chooses his own bed if it is not occupied, and otherwise randomly chooses another unoccupied bed. Use computer simulation to find for k = 1, 2,..., 7 the probability that the kth dwarf to retire can sleep in his own bed. This variant of the lost boarding pass puzzle is due to the Danish mathematician Henning Makholm.
The mean hourly wage of bottling plant employees in Nelson County is $16.50 per hour. What is the likelihood that we could select a sample of 40 bottlers with a mean of $16.75 or more? The standard deviation of the sample is $1.75
Rickets. Vitamin D is essential for strong, healthy bones. Our bodies produce vitamin D naturally when sunlight falls upon the skin.
consider the following bivariate data.point a b c d e f g h i jx 3 3 2 6 3 7 2 2 6 6y 7 1 5 6 3 7 5 7 2 5a construct a
In 1996, 20% of the students at a major university had an overall grade point average of 3.5 or higher (on a scale of 4.0). In 2000, a random sample of 1100 student records found that 25% had a GPA of 3.5 or higher. Is this evidence of grade infl..
Use differential to approximate square root of 16.3
Imagine a researcher presented a null hypothesis that in a certain community, the average energy expenditure of residents is at least 2100 calories per day. He randomly sampled 100 residents in that particular community. He computed a negative tes..
A recent survey of 150 executives at Elvers Industries, a large insurance and financial firm located in the Southwest, reported the number of pounds by which the executives were overweight. Compute the mean and the standard deviation.
Estimate the mean and the standard deviation of the distribution. Confirm these estimates by actual computation.
Customers at a coffee shop. A coffee shop serves an average of 75 customers per hour during the morning rush.
A school administrator randomly selects 12 classes from your school and then selects all of the students of those classes to study a school library issue. Which type of sampling design is being used.
Churches. For your political science class, you'd like to take a survey from a sample of all the Catholic Church members in your city.
Steroids in high school A study by the National Athletic Trainers Association surveyed random samples of 1679 high school freshmen and 1366 high school seniors.
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