# Techniques for summarizing quantitative data

Be sure to provide enough detail to enable the reader can make an informed assessment of the methods being used to obtain results associated with the research problem. The number of times an observation occurs frequency for a data item variable can be shown for both quantitative and qualitative data.

The mean and standard deviation or the median and interquartile range summarize central tendency also called location and dispersion, respectively.

Credit given for only one of the following: He was the first person to use a line moving up and down as it progressed from left to right to show how values changed through time, as in the example below.

Domestic sales exhibited a cyclical pattern - up, up, down - that repeated itself on a quarterly basis, always reaching the peak in the last month of the quarter and then declining dramatically in the first month of the next.

You can also test the statistical significance using Chi-test for the cross-tabulation variables. Print Resources Bazeley, P.

You may be able to use correlations, for instance, to generate hypotheses about your results. An extensive list of both for collecting and analyzing data and on computerized disease registries is available.

A sub-set of the nominal scale is called the binary scale. Some statistical computing packages use the following to determine outliers: In the following example, people are the nodes, represented as circles, and their relationships are the links, represented as lines that connect them.

Mean-structure and multi-group analysis. How you do this will depend on your research design and your evaluation questions. Interpretation of results is not appropriate in this section.

Microsoft Excel used to perform analyses. The fact that these bars should be compared to understand the varying degree to which these causes of death contribute to total deaths is intuitively obvious.

Record data in the agreed-upon ways. Medianmeasures of shapemeasures of spread such as the range and interquartile range require an ordered data set with a logical low-end value and high-end value. Sharpe, ; Singh, Kultar.

We will also cover some of the common multivariate statistical techniques used to visualize high-dimensional data. Showing evidence of intermediate outcomes e. When the effects are seen when and only when the intervention is introduced — and if the intervention is staggered delayed across people or groups — this increases our confidence that the intervention, and not something else, is producing the observed effects.

To make the output easier to understand, it is always to good idea to visualize it with charts. How to use correlations in Excel: Given the ways in which this pie chart has failed to match human perception, let's consider an alternative form of display.

So before you run off and start making data driven decisions, we should talk about the different types of data, because your data type will determine the type of statistical analysis that you can perform. Interpretation of results -- reiterate the research problem being investigated and compare and contrast the findings with the research questions underlying the study.

Variables are dichotomous, ordinal, categorical or continuous. the number of classes should be the smallest whole number K that makes the quantity 2 to the power of K greater than the number of measurements in the data set, ex.

with 65 values, 2 to the sixth power =64 and 2 to the seventh power istherefore the number of classes is 7 (K=7)izu-onsen-shoheiso.com 3.

Visualizing Quantitative Data. 2. Visualizing Qualitative Data The methods for summarizing discrete data are similar to methods used for summarizing qualitative data, since discrete data can be put into separate categories.

Tables. In terms of summarizing techniques, the main difference between discrete data and continuous data is izu-onsen-shoheiso.com 43 AN OVERVIEW OF QUANTITATIVE AND QUALITATIVE DATA COLLECTION METHODS 5.

DATA COLLECTION METHODS: SOME TIPS AND COMPARISONS In the previous chapter, we identified two broad types of evaluation.

This course covers the essential exploratory techniques for summarizing data. These techniques are typically applied before formal modeling commences and can help inform the development of more complex statistical izu-onsen-shoheiso.com Techniques for Summarizing Quantitative Data frequency histogram A sample of 40 female statistics students were asked how many times they cried in the previous.

This quiz covers Part 1 of the Collecting & Summarizing Data chapter of the Quantitative Methods & Tools (Statistics) pillar.

Techniques for summarizing quantitative data
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