[Hot Item] Shantui Bulldozer SD16 Types of Bulldozer

An investigation of two types of bulldozers showed that 50 failures of one type of bulldozer took on an average 6.8 hours to repair with a standard deviation of 0.85 hours, while 50 failures of the other type of bulldozer took on an average 7.3 hours to repair with a standard deviation of 1.2 hours. (a) Test the null hypothesis μ1-μ2=0 (namely, the hypothesis that on an average, it takes an equal amount of time to repair either kind of bulldozer) against the alternative hypothesis μ1-μ2 ≠0 at th

Tous les pasteurs passent passent par ces 3 types de tentations 😱

Good Operation: Fixing Land Sinking Due to Deep Pond – Tough Work for Dozers and Trucks

Bulldozer uses power to Help 3 Trapped Machines