Null Hypothesis:
Ho : u = 60 (minutes)
Meaning, the average run-time of a Ryobi 40-volt battery is 60 minutes.
Alternative Hypothesis:
Ha : u < 60 (minutes)
Meaning, the average run-time of a Ryobi 40-volt battery is less than 60 minutes.
Type I Error: If the population mean is actually equal to 60 minutes, then the run-time is less than 60 minutes.
Type II Error: If the population mean is actually less than 60 minutes, then the run-time is equal to 60 minutes.
Based on the above scenario what level of significance would you use and why?