What is Mean from grouped frequency?

Is the mean of the grouped data is equal to the mean of ungrouped data?

Suppose you compare the mean of raw data and the mean of the same raw data grouped into a frequency distribution. These two means will be

How is a frequency distribution used?

it is used to find mean<median and mode of grouped data

Under what circumstances should you use a grouped frequency distribution instead of a regular frequency distibution?

You should use a grouped frequency when you have a wide range of scores.

What is a grouped frequency table?

A grouped frequency table is a statistic method to organize and simplify a large set of data in to smaller groups.

What is an 'ungrouped frequency table'?

A frequency distribution of numerical data where the raw data is not grouped.

A grouped frequency distribution is used when the range of data values is relatively small. True or false?

False. When the range is large you would use a grouped frequency distribution.

What is grouped frequency distribution?

If the observations are grouped together into classes, then the number of observations for each class gives the grouped frequency distribution (FD). This kind of FD is particularly important when the data are continuous so that you are likely to have very small frequencies for a very large number of values.

What are three types of frequency distributions?

1) Ungrouped2) Grouped 3) Qualitative

What is the length of an interval in a grouped frequency table?

The length can be found by taking the larger number in the frequency group and subtracting it to find the range.

What is the difference between simple frequency distribution and grouped frequency distribution?

frequency is the kinds of the line graph, bar graph, picture graph, pie graph. that's all

How many types are there of frequency distribution?

Introduction:Frequency distribution is used to compress and summarize the whole data by grouping the data into classes and records the data points that fall in each class. The frequency distribution is considered as the base for descriptive statistics and they are also used to define the ordinal, nominal and the interval data. Frequency distribution is the comfortable way of grouping and organizing the data.Example of Frequency Distribution:Consider the frequency table for the students in a class where the data has been grouped according to the height of the students. Range of height Total number of student's cumulative frequency3.0 - 4.5 feet 15 154.5 - 5.0 feet 20 355.0 - 6.5 feet 25 506.5 - 7.0 feet 30 80In the case of nominal data the use of the contingency table is required. The frequency distributions are used to present the data graphically.Types of Frequency Distributions:There are three types of frequency distributions. Cumulative frequency distribution,Grouped frequency distribution,Cumulative Grouped frequency distribution.Cumulative frequency distribution (type 1):The cumulative frequency can be found from the frequency distribution by adding the cumulative frequency column. The highest cumulative frequency should be equal to the total number of frequenciesTemperature Frequency Cumulative frequency47 3 2246 3 1945 4 1544 3 1243 3 9Grouped frequency distribution (type 2):The grouped frequency distribution can be formed by grouping the values together into the class intervals. The range can be calculated using the maximum and the minimum values.Data set for temperature45 48 47 43 4442 45 43 46 4645 47 46 47 4543 47 45 47 4644 43 44 46 47The grouped frequency distribution is given byClass interval midpoint frequency45- 47 46 1542 - 44 43 7Cumulative grouped frequency distribution (type 3):In cumulative frequency distribution the cumulative frequency column is added to the grouped frequency distribution so that we can get the cumulative grouped frequency distribution.Class interval midpoint frequency Cumulative frequency45- 47 46 15 2242 - 44 43 7 7

Formula of mean for grouped data?

Mean = a + [