Astronauts increased in height by an average of approximately 40 mm (about an inch and a half)during theapollo-soyuzmissions, due to the absence of gravity compressing their spines duringtheir time in space. does something similar happen here on earth? an experiment supported bynasa measured the heights of six men immediately before going to bed, and then again after threedays of bed rest (styf et al. 1997). on average, they increased in height by 14 mm, with standarddeviation 0.66 mm. find the 95% confidence interval for the change in height after three days ofbed rest.