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Why are histograms used for quantitative data and bar graphs for qualitative data? What about them makes them appropriate?
The direction of skewness of a frequency distribution is determined by the relative position of the:
a) peak of the distribution b) midpoint of the distribution c) tail of the distribution d) class limits of the distribution 3. A class of 40 students took a test consisting of 12 difficult physics problems. You would ideally like to convert the following distribution of scores into four class intervals (i.e. groups). Please complete the cf column for this simple frequency distribution.
Scores on physics quiz f cf 12 2 11 0 10 1 9 1 8 2 7 3 4 6 5 5 4 6 3 5 2 4 1 4 0 3
In a separate table, use the data from question 3 above to (a) determine the size of the class Intervals (your number of preferred Intervals Is 4), (b) find the relative frequency percentage for each class interval (c) And the cumulative frequency for each class interval. Show work for full credit.
Class Intervals Real Upper Limit I %f Cumulative/.
Use the data from Exercise #4 above to create a Cumulative Frequency Polygon (Remember to label your X and 1' axes)