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## Did I Get This – Confidence Intervals – Proportions #1

Published: Feb 16th, 2013

This document is linked from Population Proportions.

## Population Proportions

Published: Feb 16th, 2013

Confidence Intervals Sample Size Calculations When is it safe to use these methods? Let’s Summarize CO-4: Distinguish among different measurement scales, choose the appropriate descriptive and inferential statistical methods based on […]

## Population Means (Summary)

Published: Feb 16th, 2013

Let’s summarize When the population is normal and/or the sample is large, a confidence interval for unknown population mean μ (mu) when σ (sigma) is known is: where z* is […]

## Did I Get This – Confidence Intervals: Means #3

Published: Feb 16th, 2013

Here is one final practice for these confidence intervals!! The purpose of this activity is to use statistical software for calculating the sample mean. Software is particularly useful when all […]

## Did I Get This – When to Use Z-Interval (Means)

Published: Feb 16th, 2013

Below are four different situations in which a confidence interval for μ (mu) is called for. Situation A: In order to estimate μ (mu), the mean annual salary of high-school teachers in […]

## Population Means (Part 3)

Published: Feb 16th, 2013

Sample Size Calculations When is it safe to use these methods? What if σ (sigma) is unknown? CO-4: Distinguish among different measurement scales, choose the appropriate descriptive and inferential statistical methods […]

## Learn by Doing – Sample Size

Published: Feb 16th, 2013

A study was done on pregnant women who smoke during their pregnancies. In particular, the researchers wanted to study the effect that smoking has on the pregnancy length. A sample […]

## Did I Get This – Sample Size and Confidence

Published: Feb 16th, 2013

This document is linked from Population Means (Part 2).

## Did I Get This – Margin of Error

Published: Feb 16th, 2013

This document is linked from Population Means (Part 2).

## Population Means (Part 2)

Published: Feb 16th, 2013

Other Levels of Confidence Understanding the General Structure of Confidence Intervals CO-4: Distinguish among different measurement scales, choose the appropriate descriptive and inferential statistical methods based on these distinctions, and interpret […]