A researcher is interested in the eventual divorce rates of people who live together before they get married compared to those who never cohabitate before marriage. Any difference found between these groups would be of interest to the researcher, as well as to the popular media. Which of the following is an appropriate null hypothesis for this research?
a. There is no difference in divorce rates between those who cohabitate and those who do not.
b. There is a difference in divorce rates between those who cohabitate and those who do not. c. People who cohabitate before marriage have a divorce rate twice as high as those who do not. d. People who do not cohabitate before marriage have a divorce rate twice as high as those who cohabitate.

Evaluate the discriminant of each equation. tell how many solutions each equation has and whether the solutions are real or imaginary. x^2 - 4x - 5 = 0

The map shows the location of the airport and a warehouse in a city. though not displayed on the map, there is also a factory 112 miles due north of the warehouse.a truck traveled from the warehouse to the airport and then to the factory. what is the total number of miles the truck traveled?

Students at a high school were asked about their favorite outdoor activity. the results are shown in the two-way frequency table below. fishing camping canoeing skiing total boys 36 44 13 25 118 girls 34 37 22 20 113 total 70 81 35 45 231 select all the statements that are true based on the given table. more girls chose camping as their favorite outdoor activity than boys. more girls chose canoeing as their favorite outdoor activity than those who chose skiing. more boys chose skiing as their favorite outdoor activity than girls. there were more boys surveyed than girls. twice as many students chose canoeing as their favorite outdoor activity than those who chose fishing. more students chose camping as their favorite outdoor activity than the combined number of students who chose canoeing or skiing.