Pi is the population proportion of successes.
It is the estimate for s, the sample standard deviation.
p-hat is the 'proportion in your sample.' It may be given as a percentage, a proportion or you will have to figure it out as a fraction (proportion).
The two main branches of statistics is Descriptive statistics and inferential statistics.
statistics
Pi is the population proportion of successes.
In statistics, pi represents the population proportion of successes. Using p, the sample proportion of successes, inferences can be made about pi, although it is usually unknown.
If you divide the circumference of your noggin by Pi, that will be a pretty good approximation of your hat size.
It is the estimate for s, the sample standard deviation.
Pi is relevant to statistics students as it (for example) appears in the well known normal distribution probability density function.
Pi
2 pi units or 6.28 units
There are very many calculations which use pi. Many of them are in geometry: areas of circles and ellipses, volumes of solids of revolution. But there are also many applications in statistics.
p-hat is the 'proportion in your sample.' It may be given as a percentage, a proportion or you will have to figure it out as a fraction (proportion).
the double helix is DNA revolves around pi. pi is in the rainbow, the pupil in the eye and when a raindrop falls into water pi emerges in the spreading rings. it appears in colours and music. its also used in probability and statistics. clock designers use pi when designing pendulums for clocks. aircraft designers use it to calculate areas of the skin of the aircraft. pi is used for navigation such as global positioning (GPS)
Volume = 4/3*pi*63 = 904.779 cubic inches rounded to 3 d.p.
(pi)(1/pi)=1.4396 ...