A 95% confidence interval for a population mean is determined to be 100 to 120. If the sample size was incorrectly recorded as 1
0 instead of 100, the corrected interval (using sample size 100) for μ _____. a.should become narrower b.should become 10 to 20. c.should not change d.should become wider
When a sample size is increased, it decreases the width of the confidence interval. This is because the standard error decreases with an increase in sample size.
Therefore, the corrected interval should become narrower.
he would have traveled 210 miles because in half an hour he would have traveled 30 miles and in 3 hours he would have traveled 180 miles. so we have to add those up and we get our answer: 210 miles
