2.2 Histograms

24 July 2022
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question
Histogram
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A histogram is a bar graph in which the horizontal scale represents classes of data values and the vertical scale represents frequencies. The heights of the bars correspond to the frequency​ values, and the bars are drawn adjacent to each other​ (without gaps). shows shape of distribution shows location of center shows the spread of data identifies outliers use class midpoints to separate each bar
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The population of ages at inauguration of all U.S. Presidents who had professions in the military is​ 62, 46,​ 68, 64, 57. Why does it not make sense to construct a histogram for this data​ set?
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With a data set that is so​ small, the true nature of the distribution cannot be seen with a histogram.
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The histogram to the right represents the weights​ (in pounds) of members of a certain​ high-school math team. How many team members are included in the​ histogram?
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In the histogram​ above, the​ y-axis is ticked for every​ 1-person increase in​ frequency, so the number of team members in each class is given by the height of the bar in ticks.
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Fill in the blank. The heights of the bars of a histogram correspond to​ _______ values
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Frequency
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The bars in a histogram​ _______.
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touch A histogram is a graph consisting of bars of equal width drawn adjacent to each other​ (without gaps).​ Therefore, the bars touch
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Fill in the blank. A histogram aids in analyzing the​ _______ of the data.
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shape of the distribution A histogram is a visual tool used to represent and analyze data. It is basically a graphic version of a frequency​ distribution, and it can show the​ center, variation, and the shape of the distribution of the data.
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A​ _______ histogram has the same shape and horizontal scale as a​ histogram, but the vertical scale is marked with relative frequencies instead of actual frequencies.
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relative frequency histogram A relative frequency histogram has the same shape and horizontal scale as a​ histogram, but the vertical scale is marked with relative frequencies​ (as percentages or​ proportions) instead of actual frequencies.
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Fill in the blank. ​A(n) _______ distribution has a​ "bell" shape.
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normal