relative frequency polygons

In a frequency distribution, the mid-value of each class is obtained. Then on the graph paper, the frequency is plotted against the corresponding mid-value. These points are joined by straight lines. These straight lines may be extended in both directions to meet the X - a..

In a frequency distribution, the mid-value of each class is obtained. Then on the graph paper, the frequency is plotted against the corresponding mid-value. These points are joined by straight lines. These straight lines may be extended in both directions to meet the X - axis to..

Let u be the frequency of a wave. That is, the number of vibrations completed by a particle in one second is u . Time taken to complete u vibrations = 1 second. . But time taken to complete one vibration is defined as the time period of the wa..

A plot of the cumulative frequency against the upper class boundary with the points joined by line segments. Any continuous cumulative frequency curve, including a cumulative frequency polygon, is called an ogive. There are two ways of constructing an o..

Which of the following statement(s) is/are true? I. On a pareto chart, the frequencies should be represented on the y - axis. II. In a frequency distribution, the number of classes should be between 5 and 20. III. The three types of frequency distributions are histogra..

How are the polygons ABCDE and A′B′C′D′E′ related? => A′B′C′D′E′ is a 45° rotation of ABCDE. or A′B′C′D′E′ is a reflection of ABCDE. or A′B′C′D′E′ is a tra..

Which of the following statement(s) is/are false? I. Data such as blood types (A, B, AB, O) can be organised into a categorical frequency distribution. II. Except for rounding errors, relative frequencies should add up to 100. III. A statistical device used in explorat..

A frequency distribution of the duration of telephone calls monitored at the local telephone exchange are shown. Length of calls(minutes) Number of calls 2.5 - 4.5 10 4.5 - 6.5 15 6.5 - 8.5 30 8.5 - 10.5 15 Construct a frequency polygon and ogive for the data. => Graph..

The frequency distribution for the systolic blood pressure readings (in millimeters of mercury - mm Hg) of 200 randomly selected college students is given. Systolic blood pressure reading Number of students 89.5 - 104.5 24 104.5 - 119.5 62 119.5 - 134.5 72 134.5 - 149.5 26 149.5 - 164.5 1..

The frequency distribution represents the data obtained from a sample of computer repairs. The values are the mean time (in hours) between repairs on 80 machines. Mean time between repairs Number of machines 25.5 - 28.5 5 28.5 - 31.5 9 31.5 - 34.5 32 34.5 - 37.5 20 37.5 - 40.5 12 40.5 - 4..