[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 😱

Special Operation: Strong Dozer Clearing Land in Water for Road Building

Best Dozer D20 and truck 5T to push the hut to make a house on a land of size 5m X 20m

Bulldozer uses power to Help 3 Trapped Machines