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.
-What are the appropriate null and alternative hypotheses?

A) H₀: $µ_1$ - $µ_2$ = 0 and H_a: $µ_1$ - $µ_2$ $\neq$ 0
B) H₀: $µ_1$ - $µ_2$ $\neq$ 0 and H_a: $µ_1$ - $µ_2$ = 0
C) H₀: $µ_1$ - $µ_2$ = 0 and H_a: $µ_1$ - $µ_2$ < 0
D) H₀: $µ_1$ - $µ_2$ = 0 and H_a: $µ_1$ - $µ_2$ > 0