Questions from Essentials of Statistics

Q: Table showed the calculated sums of the observed frequencies, the expected

Table showed the calculated sums of the observed frequencies, the expected frequencies, and their differences. Strictly speaking, those sums are not needed. However, they serve as a check for computat...

Q: The chi-square goodness-of-fit test provides a

The chi-square goodness-of-fit test provides a method for performing a hypothesis test about the distribution of a variable that has c possible values. If the number of possible values is 2, that is,...

Q: Identify the type of table that is used to group bivariate data

Identify the type of table that is used to group bivariate data.

Q: What are the small boxes inside the heavy lines of a contingency

What are the small boxes inside the heavy lines of a contingency table called?

Q: Suppose that bivariate data are to be grouped into a contingency table

Suppose that bivariate data are to be grouped into a contingency table. Determine the number of cells that the contingency table will have if the numbers of possible values for the two variables are a...

Q: An article, titled “We’re Happiest at 74; It’s All

An article, titled “We’re Happiest at 74; It’s All Downhill till 40, Then Life Gets Better, Say Scientists,” included a graph, similar to the following one, of a happiness scale versus age. The articl...

Q: Identify three ways in which the total number of observations of bivariate

Identify three ways in which the total number of observations of bivariate data can be obtained from the frequencies in a contingency table.

Q: The t-table has entries for areas of 0.10

The t-table has entries for areas of 0.10, 0.05, 0.025, 0.01, and 0.005. In contrast, the χ2-table has entries for those areas and for 0.995, 0.99, 0.975, 0.95, and 0.90. Explain why the t-values corr...

Q: According to Dave Leip’s Atlas of U.S. Presidential Elections

According to Dave Leip’s Atlas of U.S. Presidential Elections, in the 2012 presidential election, 51.01% of those voting voted for the Democratic candidate (Barack H. Obama), whereas 57.50% of those v...

Q: According to the document Physician Specialty Data Book, published by the

According to the document Physician Specialty Data Book, published by the Association of American Medical Colleges, in 2010, 12.9% of active male physicians specialized in internal medicine and 15.3%...