Reference no: EM131007200
For which one of the following situations would a Wilcoxon rank-sum (or Mann-Whitney) test be appropriate?
a) The Mohs scale rates the hardness of minerals. If one mineral can scratch another, it is judged to be harder. (Diamond, the hardest mineral, is a 10.) Is hardness related to the weight of a 1 * 1 * 1 cm cube of the mineral?
b) Each member of a group of professional chefs rates the quality of a basket of organic vegetables on a 5-point scale. The same chefs then rate the quality of a basket of non- organic vegetables on the same scale. Are the organic veg- gies rated higher?
c) During its initial release, is there an association between the number of downloads of a new smartphone game and the number of hours since it has been released?
d) The Richter scale measures the damage potential of earthquakes. Some scientists think it is best used for judging the relative size of earthquakes and not their absolute size. Are earthquakes around the Pacific "ring of fire" rim stronger in general than those around the Atlantic? Compare earthquakes over a recent 5-year period.
e) A dog's intelligence can be judged roughly by how many times a new command must be repeated until it is learned. A researcher trained several dogs of each of 4 different breeds, teaching them 3 new commands. Are the breeds equally "intelligent"?
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What are the advantages and disadvantages of parking blocks
: Parking blocks prevent the forward movement of cars and other vehicle by acting like a "curb." Unfortunately, for elderly persons or others with poor vision, they are sometimes difficult to "see" as they project only four to eight inches off the g..
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Perfectly competitive industry earns an economic profit
: n long-run equilibrium, every firm in a perfectly competitive industry earns an economic profit. Pure competition exists in a market when firms are price makers as opposed to price takers. A natural monopoly results when the profit-maximizing output ..
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Write a script that will loop through values of n
: Write a script that will loop through values of n until the difference between the approximation and the actual value is less than 0.0001.
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Amount of capital at the beginning of a year
: The difference between the amount of capital at the beginning of a year and the amount of capital at the end of the year is equal to
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Mohs scale rates the hardness of minerals
: The Mohs scale rates the hardness of minerals. If one mineral can scratch another, it is judged to be harder. (Diamond, the hardest mineral, is a 10.) Is hardness related to the weight of a 1 * 1 * 1 cm cube of the mineral?
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Prepare closing entries and trial balance
: The last payday was December 26. Employees are owed an additional $3,900 that has not been recorded.
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An efficiency wage is designed to
: An efficiency wage is designed to
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Marginal utility for cups of coffee is constant
: Suppose that Omar’s marginal utility for cups of coffee is constant at 4.5 utils per cup no matter how many cups he drinks. On the other hand, his marginal utility per doughnut is 11 for the first doughnut he eats, 10 for the second he eats, 9 for th..
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Distributions of the ratings of a new distance
: Testing whether the distributions of the ratings of a new distance learning course were the same as rated (on the usual 5-point Likert scale) by Freshmen, Sophomores, Juniors, and Seniors who had taken the course.
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