Portage Learning MATH 110 Introduction to Statistics _ Module 1 Exam- Complete Solutions (Graded A)

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In this module, we will consider ways to describe and represent data. We will consider frequency distributions, measures of central tendency, variances, standard deviations, percentiles, and quartil... es. Section 2.1: How to Summarize Qualitative Data Using Tables & Graphs We will begin this section by looking at a frequency distribution. A frequency distribution is a tabular representation of the summary data which shows the numerical count of items in each class in the data set. Look at the following data set in Table One: Table 2.1 is a list of cars sold at The Ajax Used Car Emporium for the month of July 2014. The sales data displayed in this manner is not particularly useful to Ajax. Display the data in the form of a frequency distribution. Solution. In order to create a frequency distribution, we count the number of each model of car sold then display this information in a table. The frequency distribution for the data is shown in Table 2.2. The frequency distribution shows the number sold of each model of car. By looking at this data, Ajax can learn which brands of cars sold better than the others. The frequency distribution tells us that the bestselling brand is Ford followed closely by Nissan. On the other hand, the brand least sold was Jeep. NOTE: For any frequency distribution, the classes must not be allowed to overlap. An overlap will result in double counting of an item and will lead to erroneous results. For some types of data, such as the car brands in example 2.1 [Show More]

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