BUSINESS ADMINISTRATION
COMPUTER APPLICATION IN BUSINESS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
4
|
|
|
7
|
|
|
28
|
|
|
11
|
Detailed explanation-1: -How to Find the Mean. The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count.
Detailed explanation-2: -First of all, we should know that the mean of ‘n’ numbers is equal to the sum of n numbers divided by total numbers i.e. n. Hence, the mean of 1, 2, 3, 4, 5, 6, 7 is 4.
Detailed explanation-3: -Expert-Verified Answer The mean of the given data is the sum of all the terms divided by the number of terms in the data. Now, we will obtain the difference of mean from each term of the data. Now, we will square each of the differences obtained and add them. Therefore, the standard deviation is 2.58.
Detailed explanation-4: -In this question, the given numbers are 1, 2, 3, 4 and 5. Where for any number x, |x|denotes the modulus of x and ˉa is as defined in equation (1.1). Therefore, from equation (1.2), we obtain the standard deviation of 1, 2, 3, 4 and 5 to be 1.2 which matches option (b). Hence (b) is the correct answer to this question.