# What Are t-Tests? - Assessing Statistical Differences Between Groups

Instructions:

question 1 of 3

### When are degrees of freedom lost?

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### 2. Some high school students were divided into two groups, group A and group B, and given the same test. Group A consisted of 6 students and the average score was 12 with a standard deviation of 2. Group B consisted of 8 students and the average score was 11 with a standard deviation of 3. The variability within the groups is:

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With this quiz/worksheet combo you will be examined principally on what t-Tests look for, their hypotheses, and standard deviation.

## Quiz & Worksheet Goals

Specifically you will be assessed on:

• The t-value
• The purpose of the t-test
• Degrees of freedom lost
• The null hypothesis
• The calculation of standard deviation

## Skills Practiced

• Information recall - access the knowledge you've gained regarding quantifiable differences between groups
• Distinguishing differences - compare and contrast topics from the lesson, such as null hypotheses
• Reading comprehension - ensure that you draw the most important information from the related lesson on t-Tests