This can be solved using the formula for t test which is = x - mu over standard deviation divided by the square root of the number of samples. In this case, it is 1185 - 1200 over 70 divided by square root of 100 which give us a value of 2.14 which is equal to .9839 in area. Only rarely, just over one time in a hundred tries of 100 light bulbs, would the average life exceed 1200 hours.
Answer:
90.84
Step-by-step explanation:
49.7+41.14= 90.84
Answer:never give up
Step-by-step explanation:
Yo
Answer:
Step-by-step explanation:
=
=36
(OR)
3(
)=3(4)=12
Its depend on your sentence structure, what u r asking!!