N(p)=4 means that there a four elements in a set P. Given:
1 answer:
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The 70th percentile is the same as the cutoff recovery time 
such that every point above this time falls in the longest 30%, i.e.
Transform to the standard normal distribution:
where
is the z-score corresponding to the cutoff time , which is approximately 
. Solve for :
Transform to the standard normal distribution:
where
Answer:
Step-by-step explanation:
In order to find the values of and
, you need to apply the binomial theorem (high-level math you most likely don't need to worry about, it's easier than multiplying all the binomials together).
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