When performing a hypothesis test to compare two or more population proportions, the expected frequencies must always be integer values?

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.

This size running track is usually called a 400 meter track. however if a person ran as close to the inside as possible on the track they would run less than 400 meters in one lap. how far away from the inside border would someone have to run to make one lap equal exactly 400 meters