The no. 1 basketball team made 72% of its free throws over the past 5 seasons and shot 450 free throws in total. The no. 2 team made 64% of its free throws over the past 5 seasons and shot 550 free throws in total. You randomly select
40 free throws from each team and record whether they made the shot. Let o, -, be the difference in the sample
proportions of successful free throws where o, is the proportion of free throw shots made by the no. 1 team and is
the proportion of free throw shots made by the no. 2 team.
Determine the mean of the sampling distribution of Ô, - Ôz. Enter your answer as a decimal rounded to the
hundredths place.
The mean difference of the sampling distribution of the difference in the proportion of free throw shots made between
the no. 1 and no. 2 teams is