learn statistics definition normal distribution

There are two types of frequency distribution. (a) Inclusive (b) Exclusive In the inclusive type, the upper limit of one class does not coincide with the lower limit of the next class. In the exclusive type, the upper limit of one class coincides with the lower limit of the next class..

Mean is the arithmetic average. To find mean of ungrouped data and it is obtained by adding the raw scores and dividing the sum by the number of items. There are three methods to find mean for a frequency distribution. (i) Direct method, (ii) Short-cut method, (iii) Step..

Inclusive type of frequency distribution can be converted into exclusive type as in Table (..

Mean of a binomial distribution = np = 9 Variance of a binomial distribution = npq = 6 Binomial distribution is given by..

Question: Draw a histogram and a frequency polygon for the following frequency distribution. Answer: ..

Question: Using class intervals 0-4, 5-9, 10-14, ... construct the following distribution for the following data. 13, 6, 10, 5, 11, 14, 2, 8, 15, 16, 9, 13, 17, 11, 19, 5, 7, 12, 20, 21, 18, 1, 8, 12, 18 Answer: ..

Question: The time required in minutes for each of the 50 students to read 20 pages of a book is recorded below: 43 52 47 49 36 48 41 47 50 32 45 48 40 43 48 36 51 44 49 53 37 34 42 47 45 47 44 50 31 48 43 45 44 36 51 51 43 53 46 39 50 42 42 47 38 49 46 40 38 45 With the information, taking cl..

The mean deviation (M.D) of a statistical data is defined as the arithmetic mean of the numerical values of the deviations of the items from some average. For an individual series, For a frequency distribution, If M.D is calculated about mean, then it is w..

Question: Find the mean for the following distribution: Answer: Mean=7.02..

Question: If the mean of the following distribution is 6, find the value of p. Answer: N = 11 Mean = 6 66 = 53 + 2p 2p = 13 p = 6...