fastR2 (version 1.2.4)

HeliumFootballs: Punting helium- and air-filled footballs

Description

Two identical footballs, one air-filled and one helium-filled, were used outdoors on a windless day at The Ohio State University's athletic complex. Each football was kicked 39 times and the two footballs were alternated with each kick. The experimenter recorded the distance traveled by each ball.

Format

A data frame with 39 observations on the following 3 variables.

trial

trial number

air

distance traveled by air-filled football (yards)

helium

distance traveled by helium-filled football (yards)

References

Lafferty, M. B. (1993), "OSU scientists get a kick out of sports controversy", The Columbus Dispatch (November, 21, 1993), B7.

Examples

data(HeliumFootballs)
gf_point(helium ~ air, data = HeliumFootballs)
gf_dhistogram( 
  ~ (helium - air), data = HeliumFootballs, 
  fill = ~ (helium > air),  bins = 15, boundary = 0 
)