Université de SaintBoniface (USB) (Affiliated with the University of Manitoba)
STATS 2000

Winter 2015
U13
Distribution of the Sample Mean
To find this distribution, we ask:
What would happen if we repeatedly took samples
of the same size n from the population and
calculated ?
U11
Probability Distribution
U14
Distribution of the Sample Mean
The probabil
Université de SaintBoniface (USB) (Affiliated with the University of Manitoba)
STATS 2000

Winter 2015
U43
Probability
We toss a coin and record the proportion of heads that
has been observed after each toss. Assuming the coin
is fair, the likelihood of observing a Head is the same
as that for observing a Tail. There is a 50% chance of
either outcome.
Sup
Université de SaintBoniface (USB) (Affiliated with the University of Manitoba)
STATS 2000

Winter 2015
U53
Distribution of a Sample Proportion
Let be the sample proportion of successes in a simple
random sample drawn from a large population having
population proportion p of successes.
The mean and standard deviation of
are
and
U54
U51
Distribution of a
Université de SaintBoniface (USB) (Affiliated with the University of Manitoba)
STATS 2000

Winter 2015
U33
Comparing Several Means
There is a problem with conducting these six tests separately
we will get six different Pvalues.
Suppose we used = 0.05 as our level of significance for each
of the tests. Now we have a 5% chance of incorrectly rejecting
the