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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
When your sample data is all negative values how can you convert it for use on a normal distribution?
The data from a normal distribution are symmetric about its mean, not about zero. There is, therefore nothing strange about all the values being negative.
Could a frequency distribution contain qualitative data?
Yes.
A frequency distribution is obtained by?
A frequency distribution can be best interpreted if it is transformed into a frequency table with the tabulated data obtained from data gatherings such as but not limited to: poll, survey, grade, questionnaire, demographic, monthly/semestral/annual report.
What table is used to group data into intervals?
Frequency Distribution Table
When each data class has the same frequency the distribution is symmetric?
No. It would not be symmetric if the data classes were of different widths.
What is grouping of data into classes giving the number of observation in each class?
frequency distribution
Can frequency distribution contain qualitative data?
frequency distribution contain qualitative data
When drawing frequency distribution histograms what does it mean when the distribution is broken?
A histogram is "a representation of a frequency distribution by means of rectangles whose widths represent class intervals and whose areas are proportional to the corresponding frequencies.Broken distribution means that no data point falls in that class.
For a symmetric distribution of data the mean is equal to which other quantity?
Median.
Is frequency polygon proportional to class frequency?
No, a frequency polygon is a type of data visualization that uses line segments to connect points representing the frequencies of different classes. It shows the distribution of data values, but it does not necessarily represent the actual class frequencies.
When data is collected using a qualitative nominal variable male or female what is true about a frequency distribution that summarizes the data?
class midpoints can be computed
What is an 'ungrouped frequency table'?
A frequency distribution of numerical data where the raw data is not grouped.
What is a frequency distribution for a set of data?
anonymously
What is data handling in maths?
frequency distribution
What is the modal class in a grouped data if there are two classes with the same highest frequency?
They are both modal classes - the distribution is bi-modal.
What are some benefits of representing data sets using graphs of frequency distribution?
Organizing the data into a frequency distribution may make patterns within the data more evident.
