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Confidence Interval for the mean - s.d of population known or large sample size

Confidence Interval for the mean - s.d of population known or large sample size

Author: Bob Kibler

At the end of this lesson, you will be able to;

  • develop a confidence interval for the mean of the population
  • interpret the meaning of the confidence interval
  • determine the size of a sample needed to find an estimate with a given interval
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Confidence Interval for the mean with the s.d. known or a large sample size



Do I get it?

Do I get it? - Answers

1.  58.1 space m g

2.   z subscript alpha over 2 end subscript equals 1.96


3.  1.96 open parentheses fraction numerator 4.2 over denominator square root of 50 end fraction close parentheses equals space 1.16

4.    58.1 space plus-or-minus 1.16 space space
left parenthesis 56.94 space m g space minus space 59.26 space m g right parenthesis