Frequency and Histogram notes
Frequency and Histogram notes 3000
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This 1 page Class Notes was uploaded by Arnold E on Wednesday January 6, 2016. The Class Notes belongs to 3000 at Fort Valley State University taught by Dr. Chitsonga in Winter 2016. Since its upload, it has received 23 views. For similar materials see Statistics in Math at Fort Valley State University.
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Date Created: 01/06/16
Frequency + Histograms Saturday, August 8,1:00 PM Audio recording started: 2:14 PM Thursday, August 20, 2015 Statistics: Collecting data Analysis Presentation Interpretation Data: Qualitative (numeric descriptions such as the numbers basketball players wear, non numeric) Quantitative (numeric, how much or how many) Frequency distribution: Mathematics Achievement Test scores for a sample of 50 6th graders. [A list of like 50 numbers was on the board] Example: Class width = (max - min)/(number of classes) The number of classes has to be given. The Class width in this example turned out to be 9.5 rounded to 10. Class width = 10 Score Frequency Relative Frequency 40-49 IIIII 5 0.10 50-59 IIIIIIIIII 10 0.20 60-69 IIIIIIIIIIIIIII 15 0.30 70-79 IIIIIIIIIII12 0.24 80-89 IIIIIII 7 0.14 90-99 I 1 0.02 1. How many students answered fewer than 50 questions correctly? 10% of students or 5 students. 2. How many students answered 80 or more questions correctly? 16% or students or 8 students. Cumulative Frequency: Test scores Cumulative Freq. Less or equal to …. ???* I got lost here, it's difficult to see and hear. HW: Draw a histogram. Use any methods. He'll ask you how you did it next time.
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