In general, 67 percent of people know how to tie a necktie. But among those who prefer checkers to chess, only 51 percent know how to tie a necktie.

Based on a survey of 203 people who prefer checkers to chess and 550 people in general.

In general, 21 percent of people refuse to tip a server if they receive poor service. But among those who consider music from the '80s to be "Oldies," 37 percent refuse to tip if they receive poor service.

Based on a survey of 123 people who consider music from the '80s to be "Oldies" and 488 people in general.

In general, 61 percent of people know how to drive stick-shift. But among those who have been in a fist fight, 76 percent know how to drive stick-shift.

Based on a survey of 156 people who have been in a fist fight and 473 people in general.

In general, 17 percent of people have written a fan letter to a celebrity. But among those who have bumper stickers on their vehicle, 34 percent have written a fan letter to a celebrity.

Based on a survey of 86 single people and 456 people in general.

In general, 65 percent of people think ambition influences success more than privilege. But among those who are allergic to pet dander, only 52 percent think ambition is the greater influencer of success.

Based on a survey of 112 people who are allergic to pet dander and 516 people in general.

In general, 30 percent of people have children. But among those who support the idea of single-sex public schools, 47 percent have children.

Based on a survey of 115 people who support the idea of single-sex public schools and 535 people in general.

In general, 36 percent of people use air freshener in their home. But among those who have less-than-excellent credit, 50 percent use air freshener in their home.

Based on a survey of 153 people who don't have excellent credit and 523 people in general.

In general, 64 percent of people like to use exclamation points. But among those who dislike Lady Gaga, only 52 percent like to use exclamation points.

Based on a survey of 294 people who dislike Lady Gaga and 534 people in general.

In general, 72 percent of people like guacamole. But among those with summer birthdays, 83 percent like guacamole.

Based on a survey of 184 people with summer birthdays and 564 people in general.

In general, 20 percent of people know how to Moonwalk. But among those who consider themselves blunt, 31 percent know how to Moonwalk.

Based on a survey of 178 people who consider themselves more blunt than tactful and 453 people in general.