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19 Cards in this Set
- Front
- Back
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A common rule of thumb for determining how many classes to use when developing a frequency distribution with classes is |
Between 5 and 20 classes |
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A histogram is used to display which of the following characteristics for a quantitive variable |
The approximate center of the data, the shape of the distribution, and the spread in the data |
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Which of the following is a reason for constructing a joint frequency distribution |
To help analyze the relationship between two variables |
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One of the key differences between a bar chart and a histogram is |
A bar chart is used to display a categorical variable in a histogram is used to display the distribution of a quantitive variable |
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The city Council has just voted to pass the cities budget for next year. If you were writing a report describing the budget so the citizens could understand how the total tax dollars will be spent, which of the following graphs might be most appropriate? |
A pie chart |
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To show how the price of a stock has changed over the last three months, the best type of chart to use is |
A line chart |
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The managers at Harry's Pizza in Boston have tracked the tips received by their drivers along with the total bill to the customer. An appropriate graph for analyzing the relationship between these two variables is |
A scatter diagram |
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What is a frequency distribution? |
A summary of a set of data that displays the number of observations in each of the distributions distinct categories or classes |
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What is discrete data? |
Data that can take on accountable number of possible values |
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What is a relative frequency? |
The proportion of total observations that are in a given category. Relative frequency is computed by dividing the frequency in a category by the total number of observations. The relative frequencies can be converted to percentages by multiplying by 100 |
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What is continuous data? |
Data whose possible values are uncountable and that may assume any value in an interval |
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What are mutually exclusive classes? |
Classes that do not overlap, so that a data value can be placed in only one class |
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What are all inclusive classes? |
A set of classes that contains all the possible data values |
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What are equal with classes? |
The distance between the lowest possible value and the highest possible value in each class is equal for all classes |
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What are the four criteria that classes in a frequency distribution should meet? |
They must be mutually exclusive. They must be all inclusive. They should be equal with. None of the classes should be empty |
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What is a frequency histogram? |
A graph of a frequency distribution with the horizontal axis showing the classes, the vertical axis showing the frequency count, and (for equal class width) the rectangles having a height equal to the frequency in each class |
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What is a O give? |
The graphical representation of the cumulative relative frequency. A line is connected to points plotted above the upper limit of each class at a height corresponding to the cumulative relative frequency |
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What is a joint frequency distribution? |
A frequency distribution that can be constructed for qualitative or quantitative variables. But shows more than one variable (see page 43) |
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What is a Pareto chart? |
A special type of bar chart where the bars have been arranged in order from high to low |
