a yo-yo company wants to boast that after 1million throws, the strings on their yo-yos still won't break. Someone in charge decides they should test the durability of their strings first so they don't get sued. They manufacture yo-yoing robots and randomly select 300 yo-yos to be tested. The results show an average of 999,986 throws before breaking. Assuming the population standard deviation is 247 throws, use a hypothesis test at the 1% significance level to see if the company would be safe in making this claim.