Which summary statistics

There are two main types of summary statistics used in evaluation: measures of central tendency and measures of dispersion. Measures of central tendency provide different versions of the average, including the mean, the median and the mode. Measures of dispersion provide information about how much variation there is in the data, including the range and the standard deviation. This page is a stub a minimal version of a page. You can help expand it. Click on Contribute Content or Contact Us to suggest additional resources, share your experience using the option, or volunteer to expand the description.

Q2 What are standards for healthy air quality? Q3 How does air quality relate to human health? Q4 Which patterns can be identified in the air quality in the four major cities over the year? Q5 Which patterns can be identified in the air quality in the four major cities during a day? This research is based on the published figures from The data set contains negative values.

These are due to problems with the measurement instruments and are replaced by NA not available. A graphical data analysis has been performed to detect outliers. Outliers are examined and it has been discussed how to deal with these values. Option 1. See the research example above about air pollution in the four major Dutch cities. Choose one of these cities and investigate the pattern over the year see section Operationalization 1 : pattern over the year.

Option 2. Analyze the data in this file: i compare the number of properties sold in January , and Data Analytics.

Casus: comparison of the air quality in the four major Dutch cities 1. Descriptive statistics deals with the collection, organization, summaries, and presentation of data. Big data related to population, economy, stock prices, and unemployment needs to be summarized systematically to interpret it correctly. The summary table is a visual representation that summarizes statistical information about the data in a tabular form. Here are a few summary statistics about a certain country:.

Summary statistics is a part of descriptive statistics that summarizes and provides the gist of information about the sample data. Statisticians commonly try to describe and characterize the observations by finding:. In a class, the collection of scores obtained by 30 students is the description of data collected. To find the mean of the data, we will need to find the average marks of 30 students. If the average marks obtained by 30 students is 75 out of , then we can derive a conclusion or give judgment about the performance of the students on the basis of this result.

Summary statistics helps us get the gist of the information instantly. Statisticians describe the observations using the following measures. The arithmetic mean, median, mode, and interquartile mean are the common measures of location or central tendency. Standard deviation, range, variance, absolute deviation, interquartile range, distance standard deviation, etc. The coefficient of variation CV is a statistical measure of the relative spread of data points around the mean. Some of the graphs and charts frequently used in the statistical representation of the data are given below.

Using the information given in the pie chart, determine the percentage of students who chose English. On World Environment Day, schools decided to plant tree saplings in their gardens. The following data shows the number of plants that survived in each school after one month. We need to represent this large amount of data in such a way that a reader can understand it easily. To include all the observations in groups, we will create various groups of equal intervals.

Which of the following data sets has the second-largest arithmetic mean? A scientist is studying reaction times. The mean reaction time is 7 and the standard deviation is 0.

Which highest and lowest reaction times should be eliminated? Here are a few activities for you to practice. This mini-lesson targeted the fascinating concept of summary statistics.