Use the Following Information for Questions:
a Bank Official $µ_1$

Multiple Choice

Use the following information for questions:
A bank official wants to assess if the average delays for two airlines are different.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 6 minutes delay with a standard deviation of 5 minutes. A random sample of 10 flights for Airline 2 shows an average of 12 minutes delay with a standard deviation of 5 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 different than the average delay for Airline 2.
B) The results are not statistically significant so there is not enough evidence to conclude that the average delays are different.
C) The average delay for Airline 1 is at least 3 minutes less than for Airline 2.
D) None of the above.