Question

Step 1

**Explanation:**

Denote *µ*1 = true population mean for Burlington teachers’ salary and *µ*2 = true population mean for Sudbury teachers’ salary.

The test hypotheses are:

Null hypothesis:

*H*0: *µ*1 – *µ*2 = 0, that is, there is no difference between the teachers’ mean salaries, between Burlington and Sudbury.

Alternative hypothesis:

*Ha*: *µ*1 – *µ*2 < 0, that is, the mean salary of te...

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