Wo runners are saving money to attend a marathon. The first runner has $112 in savings, received a $45 gift from a friend, and w
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Let be the surface of the rectangular prism bounded by the planes
,
,
,
,
, and
. By the divergence theorem, the integral of
over
is given by the integral of
over the interior of
(call it
):
Answer:
Step-by-step explanation:
Previous concepts
Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".
The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".
Solution to the problem
Let X the random variable that represent the scores of a population, and for this case we know the distribution for X is given by:
Where and
We are interested on this probability
And the best way to solve this problem is using the normal standard distribution and the z score given by:
If we apply this formula to our probability we got this:
And we can find this probability using the normal standard table or excel and we got: