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The Question & Answer (Q&A) Knowledge Managenet

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Table of Contents

- What is the formula for Hz?
- How do you find frequency when given wavelength?
- What is the frequency and wavelength?
- What are the three units of frequency?
- What are some examples of frequency?
- What is frequency and its unit?
- What are types of frequency?
- How many types of frequency curves are there?
- What is the difference between a frequency table and a grouped frequency table?
- How do you create a grouped frequency table?
- What is range in frequency table?
- How do you find the range example?
- How do you find class range?
- How do you find the range of a list of numbers?

Physical value | symbol | unit |
---|---|---|

Cycle duration | T = 1 / f | second |

Frequency | f = 1 / T | hertz |

Wavelength | λ | meter |

Wave speed | c | meter per second |

Convert your wavelength into meters. Divide the speed of light, ~m/s, by the wavelength in m. This gives you the wave’s frequency.

The wavelength and frequency of light are closely related. The higher the frequency, the shorter the wavelength. Because all light waves move through a vacuum at the same speed, the number of wave crests passing by a given point in one second depends on the wavelength.

Given this definition, it is reasonable that the quantity frequency would have units of cycles/second, waves/second, vibrations/second, or something/second. Another unit for frequency is the Hertz (abbreviated Hz) where 1 Hz is equivalent to 1 cycle/second.

Examples of Frequency

- For example, a human heart may beat at a frequency of 68 beats per minute.
- A 78 record on a turntable turns at the rate of 78 revolutions per minute or 78 rpm.

Hertz

Types of Frequency Distribution

- Grouped frequency distribution.
- Ungrouped frequency distribution.
- Cumulative frequency distribution.
- Relative frequency distribution.
- Relative cumulative frequency distribution.

There are two types of Cumulative Frequency Curves (or Ogives) : More than type Cumulative Frequency Curve.

A frequency table reports every value in a given data set, whereas a grouped frequency table reports intervals or ranges of values.

Creating a Grouped Frequency Distribution

- Find the largest and smallest values.
- Compute the Range = Maximum – Minimum.
- Select the number of classes desired.
- Find the class width by dividing the range by the number of classes and rounding up.
- Pick a suitable starting point less than or equal to the minimum value.

To get started, put the numbers in order, then find the smallest and largest values in your data, and calculate the range (range = largest – smallest).

The Range is the difference between the lowest and highest values. Example: In {4, 6, 9, 3, 7} the lowest value is 3, and the highest is 9. So the range is 9 − 3 = 6.

Find the range by subtracting the lowest point from the highest: the difference between the highest and lowest score: 98 – 52 = 46. Divide it by the number of classes: 46/5, = 9.2. Round this number up: 9.2≅ 10.

The range is the difference between the smallest and highest numbers in a list or set. To find the range, first put all the numbers in order. Then subtract (take away) the lowest number from the highest. The answer gives you the range of the list.