One of the advantages of a pie chart is that it clearly shows that the total percentages of all the categories add to 100%.

One useful way to find a "breakthrough" paper that clarifies concepts is to do a thorough, systematic search.

Some experts estimate that the length of time people live in a house has a mean of 7.3 years and a standard deviation of 2.2 years.Explain why you could estimate the probability that 100 people selected at random had lived in their houses for an average of 9 years or more,but you could not estimate the probability that an individual had done so.

Driver Cooper has a poor driving record and pays double the usual premium as a high-risk driver. The regular premium would be $510 for a year. If Cooper must pay the high-risk premium every year for 5 years, how much more will Cooper pay for insurance premiums than a low-risk driver receiving a 10% discount over the same 5-year period?

Scatterplots can be used to explain the relationship between one categorical variable and one quantitative variable.

Comparing the output of strawberries grown on plots using fertilizer A with that grown on otherwise identical plots using fertilizer B,in order to make a general assessment of relative fertilizer effectiveness,may well call for a:

A) Friedman test.
B) Kruskal-Wallis test.
C) Wilcoxon rank-sum test.
D) Spearman rank correlation test.