1. Travelocity would like to estimate the current average domestic airfare. The following data shows the airfares for 24 randomly selected tickets for travel within the United States:
$356 $275 $371 $384 $457 $326 $414 $367
$362 $286 $104 $136 $320 $244 $370 $215
$322 $409 $303 $489 $251 $361 $337 $265
a. Construct a 99% confidence interval based on the sample of data
b. What is the margin of error for this sample?