Find the number z that is the 2020th percentile of the standard normal distribution.
1 answer:
The 20th percentile corresponds to the "top" 20% of the distribution, i.e. the critical value
such that
where
is the CDF for a standard normal distribution.
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85 - 70 = 15
15/70 = 0.21428571428
Round to .21
Move decimal over twice to the right
21%
first 8-3=7 and tas 2 random so tyere left 5/11
8
is the answer hope that helps
Percentage errors and percentage difference
Area of a circle, if i remember correctly, is Pi r2, so that would be
380.1327111
Round up if needed