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Sampling without Replacement
Sampling without ReplacementSampling without Replacement
Sampling without Replacement
Suppose an urn contains
n1 balls of a color, n2 balls of a second color, n3 balls of a third
color, etc. Simulate drawing balls without replacing them.
Using Vectors to Determine Velocity
Using Vectors to Determine VelocityUsing Vectors to Determine Velocity
Using Vectors to Determine Velocity
A small fishing boat leaves from the south bank of the Allegheny River and heads at an
80° angle with an engine speed of 20 knots. However, the eastward force of the current
carries the boat along so it actually travels at a 60° angle with the shore.
How fast is the current, and how fast does the boat actually travel?
1. Enter a random seed using the
RandSeed
command.
2. Assuming the urn contains 10 red balls
and 25 white balls, simulate picking 5
balls at random from the urn without
replacement. Enter
drawball({10,25},5).
Result: 2 red balls and 3 white balls.