The volleyball coach at a large high school wants to estimate the number of times players spike the ball during anygiven 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?
O using a sample of size 15
O using a sample of size 25
O constructing a 90% confidence interval
O constructing a 99% confidence interval

alexusjones6042   ·   05.06.2022 04:10
ANSWER(S): 2 Show answers 5 Сomment
answered: levicorey846
26.06.2019 00:00


step-by-step explanation:

answered: lizbeth232001
24.06.2019 20:30
Lol english
answered: nimahmustafa
23.06.2019 05:20

show us the picture

step-by-step explanation:

show the !

answered: jack487
05.06.2022 04:10

constructing a 90% confidence interval

Step-by-step explanation:


at a 95% confidence interval By use of the table we have a critical value of 1.96, and so the margin of error is 1.96/(2 √ 900 = 0.03267, or about 3.3%.


A 90% confidence interval has a z-score (a critical value) of 1.645. In conclusion, the margin of error is 2.52%.


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