The answer is B.
Hope it helps!
x = number of hours
want to find probability (P) x >= 13
x is N(14,1) transform to N(0,1) using z = (x - mean) / standard deviation so can look up probability using standard normal probability table.
P(x >= 13) = P( z > (13 - 14)/1) = P(z > -1) = 1 - P(z < -1) = 1 - 0.1587 = 0.8413
To convert that to percentage, multiply 100, to get 84.13%
The
row is filled by just plugging in the corresponding values of
and
into the ODE.
For example, when
and
, you have
and so on.
Answer:
6$ is the correct answer have a good day :)
