Mean - practice problems
the arithmetic mean (simply the mean or average) is the sum of a collection of numbers divided by the count of numbers in the collection. The arithmetic mean is the most commonly used and readily understood measure of central tendency in a data set. It is a statistical characteristic of the center of a given data set.Arithmetic mean is a quantity very sensitive to extreme values, so the median and mode are also used in practice. Mode is the most common value. The median halves the ordered file.
Number of problems found: 625
- Variance formula
Find the variance of 10,10,10,20,20,30. - Harmonic HM example
Find the harmonic mean of 4 and 8. - A sample variance
Calculate the value of the sample variance. −8,−8,−3,13,4,−8,10,8 - Harmonic 4
Find the harmonic mean of -6 and 5. - Harmonic mean
Harmonic means of 6 and 12 - Three em
Find the mean, median, and mode for 31,63,75,75,98 - The average 3
The average of fractions is 7/10. One of the fractions is 2/3; the other fraction is? - HP - harmonic progression
Determine the 10th term of the harmonic progression 6,4,3,… - Find the mean
Find the number between 13 and 29. - Numbers
Find a number on the number line that has the same distance from these numbers: - Geometric 20
Find the geometric mean of 15 15 20 25 30. - Calculate 6688
Calculate the average of the numbers 2.3 4.01 0.65 6. - The average 11
The average of a set of 7 numbers is 20. The average of a second set of 13 numbers is 40. What is the mean of all 20? - Z-score 3
A random variable X has a mean of 4 and a standard deviation of 2. What is the corresponding z-score for x = 7? - Insert 5
Insert five harmonic means between 1/2 and 1/26 - Insert AP member
Insert arithmetic means between 75 and 180. - Dataset
Data: 11,15,11,16,12,17,13,21,14,21,15,22 Find dispersion of a given dataset. - The mean
The mean of four numbers is 5, and the mean of three different numbers is 12. What is the mean of the seven numbers together? - The midpoint
The midpoint of (2, 5) and (8, y) is (5, -1). Find the line equation in slope-intercept form. - Average 66794
Look for three numbers with an average of 2000. The middle number is 2000
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