# Question

For which one of the following situations would a Kruskal-Wallace 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 veggies 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?"

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 veggies 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?"

## Answer to relevant Questions

For which one of the following situations would a Wilcoxon signed-rank test be appropriate? a) Comparing the ratings of a new product on a 5-point Likert scale by a panel of consumers to their ratings of a competitor's ...For the probabilities of Exercise 8 and the decision tree of Exercise 4, using the expected values found in Exercise 8, compute the standard deviations of the values associated with each action and the corresponding ...If you think the probability of being called for an interview is 0.30, calculate the expected value of each action in Exercise 15. Which is the better action in this case? For the energy investment of Exercise 22 and using both of the probabilities considered in that exercise, find the Expected Value of Perfect Information. In exercise An investment bank is thinking of investing in a start-up ...An investor is considering how to invest her money. She has two options—either a domestic mutual fund that only invests in blue chip stocks or an international aggressive mutual fund that invests in young technical firms. ...Post your question

0