Exam 24: Two-Way Tables and the Chi-Square Test

A professor wants to know if students who regularly attend lecture and read the textbook perform differently in her introductory statistics course than the students who only read the textbook. The results are as follows: Based on the P-value for the chi-square statistic, we can conclude (at  = 0.10) that

In 2015 the Tampa Bay Rays had the following record for the season: The P-value for this table's chi-square statistic is:

A professor wants to know if students who regularly attend lecture and read the textbook perform differently in her introductory statistics course than the students who only read the textbook. The results are as follows: The chi-square statistic for this table has how many degrees of freedom?

Here is a two-way table showing enrollment data for full-time undergraduate students in U.S. colleges and universities. The entries are thousands of students: The P-value for this table's chi-square statistic is

In 2015 the Tampa Bay Rays had the following record for the season: The previous questions lead to this conclusion about the relationship between where the team played and how well it did:

A study of college football players' involvement with sports agents interviews a sample of college sports information directors. One question concerns revamping rules concerning timing and level of player-agent contact. Here is a two-way table of the results: How many sports information directors were interviewed?

Here is a two-way table of the numbers of college students (U.S. citizens only) classified by racial/ethnic group and by whether they attend a public or a private college. The entries are in thousands of students. What percent of public college students are non-Hispanic blacks?

Simpson's paradox occurs

A sample of 123 respondents is asked, "Should corporations attempt to use their financial resources to influence public policy, especially with respect to social issues?" The responses are as follows: The P-value for this table's chi-square statistic is:

A study of drug addicts in Amsterdam recorded how often each addict had recently injected drugs and whether or not the addict was infected with HIV, the virus that causes AIDS. Here is a two-way table of the numbers of addicts in each condition: What is the chi-square statistic for this table?

But starting salaries for men and women are nearly the same when we look at each of Mountain Tech's schools (engineering, liberal arts, and so on) separately. This is an example of

Consider the following data on college enrollment by field of study and the sex of the students: About how many college students were studying engineering?

Consider the following data on college enrollment by field of study and the sex of the students: About what percent of all female college students were enrolled in liberal arts and journalism?

A study of drug addicts in Amsterdam recorded how often each addict had recently injected drugs and whether or not the addict was infected with HIV, the virus that causes AIDS. Here is a two-way table of the numbers of addicts in each condition: From the data in the two-way table, about what is the value of the correlation between whether an addict is infected with HIV and how often he or she injects drugs?

In 2015 the Tampa Bay Rays had the following record for the season: The chi-square statistic for this table has how many degrees of freedom?

Here is a two-way table of the numbers of college students (U.S. citizens only) classified by racial/ethnic group and by whether they attend a public or a private college. The entries are in thousands of students. How many non-Hispanic black college students are there?

A study of college football players' involvement with sports agents interviews a sample of college sports information directors. One question concerns revamping rules concerning timing and level of player-agent contact. Here is a two-way table of the results: The chi-square statistic for this two-way table is ² = 19.4 with P-value < 0.001. We can conclude that:

A professor wants to know if students who regularly attend lecture and read the textbook perform differently in her introductory statistics course than the students who only read the textbook. The results are as follows: The P-value for this table's chi-square statistic is

A study of college football players' involvement with sports agents interviews a sample of college sports information directors. One question concerns revamping rules concerning timing and level of player-agent contact. Here is a two-way table of the results: A chi-square statistic for this table will have how many degrees of freedom?

In 2015 the Tampa Bay Rays had the following record for the season: What percent of their home games did the team win?