How do I calculate ranges and averages?

Question

For some reason I'm drawing a blank on this! (I'm so embarassed!) I need to calculate averages and ranges from a list of information, what do I need to do for each? Thanks so much!

Answer 1

range=highest value-lowest value
there are three averages
mean is total of all the items/no of items
median is the middle value
mode is the most repeated value

Answer 2

Fir the range: subtract lowest form the highest number and for average calculate all the numbers the divide by the amount of numbers you added. Example: 1, 6, 9, 5
add:1+6+9+5=21 then divide 21 by 4

Answer 3

In mathematics, the range of a function is the set of all "output" values produced by that function. Sometimes its is called the image, or more precisely, the image of the domain of the function.

In mathematics, an average or central tendency of a set (list) of data refers to a measure of the "middle" of the data set. There are many different descriptive statistics that can be chosen as a measurement of the central tendency. The most common method, and the one generally referred to simply as the average, is the arithmetic mean. Please see the table of mathematical symbols for explanations of the symbols used.

In statistics, the term central tendency is used in some fields of empirical research to refer to what statisticians sometimes call "location". A "measure of central tendency" is either a location parameter or a statistic used to estimate a location parameter.

(average of 3,4,5
=(3+4+5)/3
=12/3
=4)
In descriptive statistics, the range is the length of the smallest interval which contains all the data. It is calculated by subtracting the smallest observations from the greatest and provides an indication of statistical dispersion.

It is measured in the same units as the data. Since it only depends on two of the observations, it is a poor and weak measure of dispersion except when the sample size is large.

For a population, the range is more than twice the standard deviation.

The midrange point, i.e. the point halfway between the two extremes, is an indicator of the central tendency of the data. Again it is not particularly robust for small samples.

Answer 4

With an average you just add up all of the values and divide by the number of values you added up. So if you have the numbers 1,3,5,4,10 the average is (1+3+5+4+10)/5=4.6 Therefore 4.6 is your average.

Range: I've actually heard range defined two separate ways but they both come to roughly the same conclusion. Using the same values as above the range would have min,max (1,10) as the range. However I've also seen some people call it max-min=9.

Answer 5

Range is the distance between MAX and MIN subtract the lowest data from the highest to get range
Average is easy add all data and divide by the number of entries.
Ex.
Range Hi-12
low-1
12-1=11

Average-
2
4
6
8
2+4+6+8=20/4 because there are 4 entries

Answer 6

for ranges you just subtract the highest and lowest numbers and for averages you add up all the numbers you need to get an average with but the amount of number in the list. For example, if you needed to get the average of the numbers 24, 56, 24 and 35 you would do 24+56+24+35=139 then 139/4=34.75

Answer 7

Average is the sum of all the values divided by the number of values. To calculate ranges of acceptable values is a bit more complicated. You need to calculate the standard deviation of all of the values. Multiply that result by three. Add that number to the average to get the upper limit and subtract it from the average to get the lower limit. Most calculators have functions that will calulate the average and the standard deviation.

Answer 8

It's ok! :)

Range: you take the highest number and subtract the smallest number. It gives you the range

1,2,3,4,5 are your numbers

Take 5 - 1 = 4 your range

Average: Add up all the numbers you have and then divide by how many numbers you had.

(5 + 6 + 7) /3 = 6

Answer 9

Range: take the biggest number away from the smallest

Averages; 3 types;

Mean: add up all the numbers and divide by how many numbers there are
Mode: the number that makes most apperances
Median: put the numbers into numerical order, the median is the middle one

Answer 10

Hi there!

The RANGE is the group of numbers between two specific numbers, e.g.. All of the numbers between 27 and 50 or between 1 and 100.

An average is found by adding a group of numbers and dividing the sum of those numbers by the total number of items in the sample, e.g. 24+74+33=131 which divided by 3--the number of items--equals 43.667.

Have a good day!

Answer 11

To calculate the range you subtract the lower class boundry from the upper class boundry. To calculate the average or the mean you add all the values and divid them by the number of values you have