Use the Following Information for Questions:
an Airport Official $µ_1$

Multiple Choice

Use the following information for questions:
An airport official wants to assess if the flights from one airline (Airline 1) are less delayed than flights from another airline (Airline 2) . Let $µ_1$ = average delay for Airline 1 and $µ_2$ = average delay for Airline 2. A random sample of 10 flights for Airline 1 shows an average of 9.5 minutes delay with a standard deviation of 3 minutes. A random sample of 10 flights for Airline 2 shows an average of 12.63 minutes delay with a standard deviation of 3 minutes. Assume delay times are normally distributed, but do not assume the population variances are equal. Use the conservative "by hand" estimate for the degrees of freedom.
-Which of the following is an appropriate conclusion?

A) The average delay for Airline 1 does appear to be less than the average delay for Airline 2.
B) The results are not statistically significant so there is not enough evidence to conclude the average delay for Airline 1 is less than the average delay for Airline 2.
C) The average delay for Airline 1 is at least 3 minutes less than Airline 2.
D) None of the above.