In order to determine if it is unusual for a sample of 3 to have a mean of 115 or greater, assuming a normally
distributed population with a mean of 100 and standard deviation of 15, one must first determine the probability
of such an occurrence. This is

Confidence Interval for Mean
Continuous Data - Known
Population data. Normal distribution.
Confidence =
90%
1.645
95%
1.960
99%
2.575
Continuous Data - Unknown
If a relatively small sample is used, e.g. n<30,
then the t distribution must be used. Sample
s

Confidence Interval for Mean
Continuous Data - Known
Population data. Normal distribution.
Confidence =
90%
1.645
95%
1.960
99%
2.575
Continuous Data - Unknown
If a relatively small sample is used, e.g. n<30,
then the t distribution must be used. Sample
s

Week 9 Discussion Mother/Child IQ Data Set
Data consisting of the IQ scores of each person interviewed and their mother could be organized into a graph.
The purpose of a graph is to make information easily understandable. In the case of IQ scores, I would

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