The Hubble Space Telescope was put into orbit on April 25, 1990.
Unfortunately, on June 25, 1990, a spherical aberration was discovered in
Hubble's primary mirror. To correct this, astronauts had to work in space.
To prepare for the mission, two teams of astronauts practiced making repairs
under simulated space conditions. Each team of astronauts went through 15
identical scenarios. The times to complete each scenario were recorded in
days.
Arguments
Format
A data frame with 15 observations on the following 2 variables: