Reference no: EM131008025
For which one of the following situations would a Wil- coxon 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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Find the equation for the plane containing the parallelogram
: Find the equation for the plane containing the parallelogram shown. Find the area of the parallelogram with sides x→ and y→ as shown.
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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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Number of very expensive mansions
: Estimating the association between the value of homes and their age in a community known to have a number of very expensive mansions.
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Estimating the association between the value of homes
: Estimating the association between the value of homes and their age in a community known to have a number of very expensive mansions.
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Damage potential of earthquakes
: 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 gener..
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Association between the value of homes
: Estimating the association between the value of homes and their age in a community known to have a number of very expensive mansions.
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Student ratings of a course
: 1. Which of the following variables are ranks? For those that are not ranks, give the units. a) Student ratings of a course on a 5-point Likert scale.
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Advertising campaign requires understanding of target market
: Creating an advertising campaign requires an understanding of the target market your campaign will try to reach. It is also important to consider how different media options can help your campaign meet its goals. Recommend an advertising medium (eith..
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Plot the data and graph the least squares line as a check
: The data in the table are the un?ooded area ratio (x) and heat transfer enhancement (y) values recorded for the 24 integral-?n tubes. Fit a least squares line to the data.
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