A Local Retail Business Wishes to Determine If There Is $\neq$

Multiple Choice

A local retail business wishes to determine if there is a difference in preferred indoor temperature between men and women. A random sample of data is collected, with the following results (note: there are slight differences between Excel and MegaStat output in this test) :
Using a 0.05 level of significance, can we conclude that there is indeed a difference in the temperature that men prefer compared to women?
What is the null hypothesis if we assume men to be group 1 and women group 2?

A) µ₁ = µ_2, or µ_d = 0
B) µ₁ $\neq$ µ_2, or µ_d $\neq$ 0
C) µ₁ - µ₂ $\le$ 20
D) µ₁ - µ₂ > 20