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Summary (Unit 3B – Random Variables)

Published: Jan 20th, 2014

Random Variables Binomial Random Variables Continuous Random Variables We have almost reached the end our discussion of probability. We were introduced to the important concept of random variables, which are quantitative variables whose […]

More about Hypothesis Testing

More about Hypothesis Testing

Published: Mar 18th, 2013

1. The Effect of Sample Size on Hypothesis Testing 2. Statistical significance vs. practical importance. 3. Hypothesis Testing and Confidence Intervals Let’s summarize CO-1: Describe the roles biostatistics serves in the […]

Proportions (Step 4 & Summary)

Proportions (Step 4 & Summary)

Published: Mar 18th, 2013

Step 4. Drawing Conclusions Based on the P-Value Many Students Wonder: Hypothesis Testing for the Population Proportion Let’s Summarize!! What’s next? CO-4: Distinguish among different measurement scales, choose the appropriate descriptive […]

Proportions (Step 3)

Proportions (Step 3)

Published: Mar 18th, 2013

Step 3. Finding the P-value of the Test Alternative Hypothesis is “Less Than” Alternative Hypothesis is “Greater Than” Alternative Hypothesis is “Not Equal To” The Four Steps in Hypothesis Testing […]

Proportions (Step 2)

Proportions (Step 2)

Published: Mar 17th, 2013

Step 2. Collect Data, Check Conditions, and Summarizing the Data The Four Steps in Hypothesis Testing CO-4: Distinguish among different measurement scales, choose the appropriate descriptive and inferential statistical methods based […]

Proportions (Introduction & Step 1)

Proportions (Introduction & Step 1)

Published: Mar 8th, 2013

Introduction Review: Types of Variables One Sample Z-Test for a Population Proportion Step 1. Stating the Hypotheses CO-4: Distinguish among different measurement scales, choose the appropriate descriptive and inferential statistical methods […]

Errors and Power

Errors and Power

Published: Mar 8th, 2013

Type I and Type II Errors in Hypothesis Tests Reasons for a Type I Error in Practice Reasons for a Type II Error in Practice Power of a Hypothesis Test […]

Steps in Hypothesis Testing

Published: Mar 8th, 2013

Hypothesis Testing Step 1: State the Hypotheses Hypothesis Testing Step 2: Collect Dtaa, Check Conditions, and Summarize Data Hypothesis Testing Step 3: Assess the Evidence Hypothesis Testing Step 4: Making […]

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 (Part 3)

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 […]