answersLogoWhite

0

The weighted mean is simply the arithmetic mean; however, certain value that occur several times are taken into account. See an example http://financial-dictionary.thefreedictionary.com/weighted+average

User Avatar

Wiki User

15y ago

Still curious? Ask our experts.

Chat with our AI personalities

LaoLao
The path is yours to walk; I am only here to hold up a mirror.
Chat with Lao
ProfessorProfessor
I will give you the most educated answer.
Chat with Professor
FranFran
I've made my fair share of mistakes, and if I can help you avoid a few, I'd sure like to try.
Chat with Fran

Add your answer:

Earn +20 pts
Q: The weighted mean is a special case for?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Continue Learning about Statistics

The weighted mean is a special case of the?

Geometric mean


Weighted mean sample problem?

weighted mean is getting the weighted average of students. normally, it is always use in computing the general average of the students to determine the ranking of the whole class.


What is the formula for a weighted standard deviation?

Arithmatic Mean


Explain the difference between arithmetic mean and weighted mean?

The plain arithmetic mean is actually a special case of the weighted mean, except all the weights are equal to 1. The arithmetic mean is the sum of all the individual observations divided by the number of observations. With a weighted mean you multiply each observation by a weight, add those values together and then divide by the sum of the weights. E.g. Let's say you have 3 observations: 4, 7, 12 The arithmetic mean is (4+7+12) / 3 = 23/3 = 7.67 Now let's assume that you want to weight the first observation by a factor of 10, the second observation by a factor of 5 and the third observation by a factor of 2: The weighted mean is (4x10+7x5+12x3) / (10+5+2) = 111/17 = 6.53 You can see that if all the weights were 1 you would have the arithmetic mean shown above. As it is mentioned above arithmetic mean is a special case of weighted mean. In the calculation of arithmetic mean all the observations are given an equal chance of occurance ie the above mentioned problem can be written as 4*1/3+7*1/3+12*1/3=7.67 or inother words 7.67 is the number it takes if all are given equal chance whereas in weighted mean the chance of occurance are not equal .This can be written as 4*10/17+7*5/17+12*2/17=6.53 in the above eg. 4 has given more weightage than 7 and 12 has the least weightage so the probability of 4 occurring is more when compared to 7 and 12 there fore the average obtained is seen to decrease as we have given more importance to 4 than others. It shows that the average is affected by the weightage given to the numbers


How do you calculate the standard deviation of the mean using Excel?

=stdev(...) will return the N-1 weighted sample standard deviation. =stdevp(...) will return the N weighted population standard deviation.

Trending Questions
Could you use a line graph to show data? You took a first response test it showed negative and then 30 minutes later it showed positive this has happened 4 times in 2 days what does this mean Pregnant or not? How do you find the variance 415 10 8 33 25 36 66 63 50 64 49 40? Is lambda max is chosen for all quantitative analysis? How fast is a stopwatch? What is the probability of rolling an even number and a head when rolling a die and then tossing a coin? How is a conclusion different from data analysis? How many different numbers can you make with the digits 1 2 3 and 4 using each digit only once? General field of statistics? What is it called if you multiply a sum by anumber you will get the same result if you multiply each addend by that number and then add the products? What is the difference between the relative abundance and the percent? What is the difference between data warehouse testing and conventional testing? The sum of two consecutive even number is 54 find the numbers? What is the definition of standard deviation and variance? In order to determine the size of a sample the standard deviation of the population must be estimated To do this you can either take a pilot survey or it can be approximated based on a knowledge of? Segmenting a highly sensitive database results in? If you were to flip a coin eight times what is the probability of getting heads at least six times? Answers to micra - t test in English? What is 300 P S in a B? When six sigma not success?