(Need help ASAP)The volleyball coach at a large high school wants to estimate the number of times players spike the ball during any given game. She randomly selects 30 games and records the number of spikes. The coach
constructs a 95% confidence interval for the true mean number of spikes players make in a game. Which of
the following would decrease the margin of error?
using a sample of size 15
using a sample of size 25
constructing a 90% confidence interval
constructing a 99% confidence interval