0
In a relative frequency distribution what should the relative frequencies add up and 8203 to?
Wiki User
∙ 6y agoWant this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
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
What are the frequencies of these numbers 3 6 4 3 6 5 6 7 4 3 2 4 6?
The frequencies are how often each number appears. This is easiest to calculate using a tally chart: n : tally --+------ 2 : | 3 : | | | 4 : | | | 5 : | 6 : | | | | 7 : | Which is filled in by going along the numbers and adding a tally stroke to the tally of the number as it is encountered. The strokes for each number can then be totalled (usually as an extra column in the tally table above) to give the frequency for each number: n : frequency --+------------ 2 : 1 3 : 3 4 : 3 5 : 1 6 : 4 7 : 1 --+------------ Σ : 13 By summing the individual frequencies a check can be made that possibly all numbers have been tallied as the total of the frequencies should equal how many numbers there are: there are 13, so the frequencies are probably correct.
Does the size of a sample affect the values of the frequency table?
Yes. If the sample is a random drawing from the population, then as the size increases, the relative frequency of each interval from the sample should be a better estimate of the relative frequency in the population. Now, in practical terms, increasing a small sample will have a larger effect than increasing a large sample. For example, increasing a sample from 10 to 100 will have a larger effect than increasing a sample from 1000 to 10,000. The one exception to this, that I can think of, is if the focus of the study is on a very rare occurrence.
What does 2deep rule mean?
The "2-deep" rule means that a building should have only the main distribution and the intermediate distribution that feeds the horizontal distribution to the work area.
Would you want your grades based on normal distribution why or why not?
While the initial standard should be based on a distribution of some kind, and possibly not even the normal, each personal grade should not be based on it.
How are the pieces of a pie chart related to relative frequency?
The pieces of a pie chart represent the parts of a whole, as does relative frequency. The total of the entire pie chart should be 100% or 360 degrees. The sum of the relative frequencies should also equal 100%.
Why you should use a grouped frequency distribution table instead of a regular table?
Because in case grouped frequency distribution table we are sending all i.e mixed frequencies at a time with diff bandwidth wheras in case of regular table we are sending each signal at a time.
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 should you not do when constructing a frequency distribution?
Lots of things. You should not drive a car, for example.
When should relative frequencies be used when comparing two data sets?
When comparing large data sets.
Beats are produced when two sources are sounded together these sources should have what frequency?
The two frequencies should be near one another.
When a sound wave with a frequency of 256 Hz overlaps with a sound wave with a frequency of 250 Hz what would the frequency of the beats be?
There should be two beat frequencies produced: 506 Hz and 6 Hz.
What is 2k rule?
The 2k or 2 to K rule is used to determine the number of classes for a frequency distribution. The 2k rule should be used as a guide more than a dictator of determining the number of classes for a frequency distribution.
What are the most relevant spectral characteristics of speech?
Vowels are generally characterized by the location (along the frequency spectrum) and relative strength of vocal formants. I'm unsure about the spectral characteristics of consonants, but you can get information about manner of articulation by looking at the amplitude envelope. Voicing should be easy to discern from the frequency spectrum. I imagine that unvoiced phonemes have a much narrower band of frequencies.
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
Why should the number of classes in a frequency distribution be between 5 and 20?
it may be difficult to detect any patterns
Why intermediate frequency are constant?
The frequency spectrum has been distributed for various purposes. Otherwise, the people may use the frequencies of their choice & there will be wide range of interference. So, in order to ensure proper reception of signals, the standards have been fixed for the transmission of frequencies & also for the intermediate frequency because if the intermediate frequency is varied the overall frequency value will also vary. The intermediate frequency value should be so designed that it should not lie within the range of mixer stage. Otherwise, there is the production of noise signal due to the interference of mixer frequency & intermediate frequency. Also, the intermediate frequency should not be too high. Otherwise, it will reduce the selectivity of the receiver because of increase in bandwidth. Considering all these factors 455 khz is the most suitable intermediate frequency value for an AM receiver.
