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The mean of a data set is found by summing all the elements, then dividing by the number of elements in the set. This is also called the "average."
The mean of set set {1,2,3,4,5} is (1+2+3+4+5) / 5 = 3
That is correct, but to be more specific, there are several kinds of mean: the most common are arithmetic and geometric. The geometric mean is the nth root of the product of the numbers, where n is the number of elements (numbers) in the set. When the kind of mean is not given, it usually means the arithmetic mean, which is defined as above.
Also, there are several kinds of averages: mean, median, and mode, where by mean is meant the arithmetic mean. But we are getting way outside the scope of the question so I will end my answer here.
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Is it true that in large data sets the mean is always one of the data values?
No. Here's one set of data where the mean is not one of the values: a set of 250,000 numbers. 125,000 of them are "1", 125,000 are "3". The mean of this data set is "2", which is not among the data.
When is it misleading to use the mean as a descriptor of a data set?
It is misleading to use the mean as a descriptor of a data set when the median or mode would be more representative of the data set as a whole.
What happens to the mean of a data set when you add a cluster near one end of the original data set?
The mean of the new data set is shifted from the mean of the original set, in the direction of the added cluster. We note that the same would be true if only a single new element were added.
The average of a set of data is called what?
the mean.
How do you find the average or mean in a set of data?
First, you add all of the numbers in the set together. Then, you divde the sum by however many numbers there are in the set of data. Your quotient is the average/mean.
What is the methodology for calculating mean sea level from hourly tide data?
Get the daily mean from the hourly, monthly mean from hourly, yearly mean from monthly. MSL can be calculated from the monthly or yearly, longer data set needed for yearly. A filter may need to be applied depending on the method in which the data was collected
What does the term ' cache hit ratio ' mean?
calculating and storing data
When calculating the mean the researcher should use data measured at which level?
interval
What is 30 46 78 71 48 36 28 35 50 28?
This is a set of data. What do you want calculating?? You do not say. From it you can measure , MODE , MEDIAN, MEAN & RANGE.
What is another word for the mean in a set of data?
The mean of a set of data is also known is the average.
Which anomalous data might the manager throw out before calculating the mean?
Any anomalous data for which there is a clear, external explanation.
What do you call the average of a set of data?
The average of a set of data is known as its "mean."
Find the mean of the data?
The mean of a set of data is the sum of that data divided by the number of items of data.
Is it true that in large data sets the mean is always one of the data values?
No. Here's one set of data where the mean is not one of the values: a set of 250,000 numbers. 125,000 of them are "1", 125,000 are "3". The mean of this data set is "2", which is not among the data.
When is it misleading to use the mean as a descriptor of a data set?
It is misleading to use the mean as a descriptor of a data set when the median or mode would be more representative of the data set as a whole.
Does the mean have to be a member of the set of data?
no. Some mean is a number from the data but some mean is completely different from its data.
When can the mean be the largest value in the data set?
When the data set consistys of a single value.
