Answer:
with a .95 probability, the sample mean will provide a margin of error 0.196
Step-by-step explanation:
margin of error (ME) from the mean can be calculated using the formula
ME= where
- z is the corresponding statistic in the .95 confidence level (1.96)
- s is the population standard deviation (1 min.)
- N is the sample size (100)
ME==0.196
95% confidence interval for check-out time would be 3 ±0.196 min