My ping pong ball usually travels 2.75 meters when launched with a standard deviation of .15 meters. i change part of my launcher design and it now flies 3 meters on the first try. what is the probability that the new result is just random chance? (rather than because of the change i made). give your answer in %.

The answer is approximately equal to 96%.

Step-by-step explanation:

See the attached file for details.

step-by-step explanation:

a rhombus is a parallelogram enjoying his symmetry.

amount of oatypop that contains the prize = 40%

amount   of oatypop which doesn't contain the prize = (100-40)=60%

probability that hannah will win a prize

    = s +f s +f f s+ff   f s+ff f f s+ infinity.where f= failure,s= success

=   or 60%

probability that hannah only has to buy 3 or less boxes before getting a prize= (s) and ( f s) and (ff s) and (f f f s)

        = = 87.04 %  

step-by-step explanation: