An original frequency table with mean 11
Answers
Answer:
An original frequency table with mean 11 and variance 9.9 was lost but the following table derived from it was found. Contruct the original table. Value of 'd':- -2,-1,0,1,2. Frequency(f):- 1,6,7,4,24. ·
Step-by-step explanation:
To understand frequency distribution, let us first start with a simple example. We consider the marks obtained by ten students from a class in a test to be given as follows:
23, 26, 11, 18, 09, 21, 23, 30, 22, 11
This form of data is known as raw data. A statistical measure called range can be defined. It is the difference between the largest and smallest values of a data set. Here, range = 30 – 09 = 21.
Frequency Distribution Table
Now, imagine how difficult and cumbersome this process would get if there were a larger number of observations. If we were to include the test scores of all 20 students in this class, it would be very difficult to understand and interpret such data unless it is ‘organized’.