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Confidence Intervals - Conditions    When calculating confidence intervals it is important to pay close attention to sample size and whether or not you have the true value of sigma.   http://www2.cedarcrest.edu/academic/bio/hale/biostat/session17links/conintervalcon.html

Confidence Intervals - Conditions When calculating confidence intervals it is important to pay close attention to sample size and whether or not you have the true value of sigma. http://www2.cedarcrest.edu/academic/bio/hale/biostat/session17links/conintervalcon.html

Type I and Type II error. Type I error occurs when one rejects the null hypothesis when it is true and its denoted by alpha (false positive). Type II error occurs when accepts the null hypothesis when it is false and its denoted by beta (false negative).

Imagem intitulada Calculate Confidence Interval Step 3

Calcular o Intervalo de Confiança

confidence interval example How to Calculate Confidence Interval: 6 Steps (with Pictures)

A confidence interval always has two tails. If alpha is 5%, each tail is 2.5%.

A confidence interval always has two tails. If alpha is each tail is

Statistics 101: Confidence Intervals, Population Deviation Known

Statistics Confidence Interval Estimation, Sigma Known

Image result for chi-square test, independent t-test, paired t-test, ANOVA, Repeated Measures ANOVA, and correlation, describe the inferential statistics and what levels of measurement are needed

Image result for chi-square test, independent t-test, paired t-test, ANOVA, Repeated Measures ANOVA, and correlation, describe the inferential statistics and what levels of measurement are needed

Plot confidence intervals with boxes indicating the sample size/precision and a diamond indicating a summary confidence interval.

Plot confidence intervals with boxes indicating the sample size/precision and a diamond indicating a summary confidence interval.

Confidence Interval Example

Confidence Interval Example - Business Statistics Tips

And this was the hard part of exam 1...now it's old hat.

Probability distributions - useful for the Probability and Statistics questions of the STEP Paper - even though there are only 2 now!

Statistics 101: Confidence Intervals, Population Deviation Known

Statistics Confidence Intervals, Population Deviation Known. In this video we introduce the concept of a confidence interval for the population mean.

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