To properly state the hypothesis, information about the significance level and the null and alternative hypothesis should be included. Here is an example:
The significance level is set to 0.05. The null hypothesis is that the mean salary of the company's mechanical engineer is greater than or equal to $70,000 per year. The alternative hypothesis is that the mean salary of the company's mechanical engineer is less than $70,000 per year.
Hypothesis: The mean salary of the company's mechanical engineer is less than $70,000 per year.
Symbolically:
H₀: μ ≥ $70,000
H₁: μ < $70,000
Note: μ is the population mean salary of the company's mechanical engineer.