3900Chp3 - Chapter 3: A Statistics Refresher What are...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
What are Scales of Measurement? Nominal Categories Ordinal Magnitude Interval Magnitude and equal interval Ratio All others and has a true zero point Examples Groups of low, medium, high? How much you like something? 1 not at all 5 very much Frequency Distribution Summary information of scores and their occurrence. Grouped Frequency Distribution Intervals replace specific values Identification of 12-15 class intervals recommended Example of G.F.D. 20 students surveyed. Values are the number of alcoholic beverages. How do you create a frequency distribution using six classes? Steps Step 1: Find the highest and lowest values: H = 9 and L = 0. Step 2: Find the range: R = H – L = 9 – 0 = 9. Step 3: Select the number of classes desired. In this case: 6. Step 4: Find the class width by dividing the range by the number of classes. Width = 9/6 = 1.5. Value is rounded up. Step 5: Select a starting point for the lowest class limit: 0, 2, 4, 6, 8, 10. Step 6:
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 4

3900Chp3 - Chapter 3: A Statistics Refresher What are...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online