Measures of central tendency find the central value of the data points. The central value of the data points can be measured by mean, median and mode. We will discuss each term one by one with the help of the video lectures and in the next post, we will discuss the standard deviation and variance.
Mean of the data points is the average value of the given data. Mean is calculated by taking the sum of the data points divided by the total number of points. We can calculate the mean for the frequency distribution as well as for grouped data. Watch the given video tutorial to learn about the mean.
Median is the mid value of the given data. To calculate the median, arrange the data points in ascending order and then find the mid value of the data. Hence, the median is the middle term if n is odd and average of two middle terms if n is even because for even number of data points there are two middle terms. Where n is the total number of data points. We have a separate formula to find the median for grouped data. Watch the video lecture given below to learn about the median.
Variables which occurs most frequently is called the mode value. i.e value of the maximum frequency. For grouped data, we have a separate formula to calculate the mode value and we have explained it with the help of the video lecture given below. Watch it to grab the topic efficiently.
Mean for Grouped Data
We can calculate the mean for the grouped data by using the mode and median values of the data. First, we calculate the median and mode for the given data and then by using the formula we calculate the mean value of the data. Learn it through the video tutorial below.
That is all for this post. You can find more video lectures of higher engineering maths as well as basic maths. Do check them and contact us for any doubts and queries or comment on the comment section below and we will answer ASAP.