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Unformatted text preview: ider that we can rearrange the above as follows: (multiply the previous by
(subtract ) from the previous) (multiply the previous by -1)
(rearrange the inequalities) Thus Look very carefully at what this line is implying. We now have a probability that once we compute the sample mean , the population mean will
be between the two numbers and . The interval
mean that has Confidence Level equal to is called a Confidence Interval for the population
Suppose a sample of 100 individuals is collected from a population that has variance of 25. Suppose the
mean of the sample is found to be 30. Find a confidence interval for the population mean that has a
confidence level of 95%....
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