Health Sciences 3801A/B Chapter 2.2: Health Sciences 3801A/B Chapter 2.: Section 2.2 - Histograms, Frequency Polygons, and Time Series Graphs
7 Jan 2019
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Section 2. 2 - histograms, frequency polygons, and time series graphs. Convenient starting point a lower value carried out to one more decimal place than the value with the most decimal places. Histogram consists of contiguous adjoining boxes - the horizontal axis is labeled with what the data represents and the vertical axis is labelled with a relative frequency or a frequency. Relative frequency equal to the frequency for an observed value of the data divided by the total number of data values in the sample. Histograms are used when the data set contains 100+ values. N = total number of data values. If three students in ms. martin"s class of 40 students received from 90% to 100%, then f = 3, n = 40, and rf = 3/40 = 0. 075 = 7. 5% of the students received 90% to 100%. Constructing a histogram involves: deciding how many bars or intervals are needed to represent the data.
