Get out the Pencil Task from Last Thursday!

April 22nd, 2013

How did we find Probability?

What is a probability distribution?- A table or an equation that links each outcome of a

statistical experiment with its probability of occurrence

- The table below, which associates each outcome with its probability, is an example of a probability distribution

Number of heads Probability

0 0.25

1 0.50

2 0.25

How do you find mean and standard deviation of a probability distribution?

MeanEquation:

where x = data and P = probability of that data

Standard Deviation Equation:

where = mean

Find the mean and st. dev. of the table belowpg. 894 #11

Number of Nations

Frequency Probability

10-20 2

20-30 3

30-40 8

40-50 1

50-60 2

𝜇=¿

𝜎=¿

How do you put classes in the calculator??? Use class marks!

Assignment: Work on Please be Discrete Learning Task #1&2