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Measures of Central Tendency or (Measures of Location)
Enable us to locate the position of the distribution in the question
Measures of central tendency are measures of the location of the middle or the center of a distribution. The mean is the most commonly used measure
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Summary Measures Central Tendency Mean Median Mode Quartile Geometric Mean Summary Measures Variation Variance Standard Deviation Coefficient of Variation Range Harmonic Mean Mean Deviation
The arithmetic mean is what is commonly called the average:
The mean of a numeric variable is calculated by
adding the values of all observations in a data set and then dividing that sum by the number of observations in the set. This provides the average value of all the data.
. It is a method representing whole data by one figure
Mount Rival hosts a soccer tournament each year. This season, in 10 games, the lead scorer for the home team scored 7, 5, 0, 7, 8, 5, 5, 4, 1 and 5 goals. What was the mean score?
Mean = sum of all the observed values ÷ number of observations = (7 + 5 + 0 + 7 + 8 + 5 + 5 + 4 + 5 + 1) ÷ 10 = 47 ÷ 10 = 4.7//
The Mean weight of a student in a group of 6 students is 119 lbs.The individual weight of five of them are 115,109,129,117,114 lbs.What is the weight of the sixth student?
Mount Rival hosts a soccer tournament each year. This season, in 10 games, the lead scorer for the home team scored 7, 5, 0, 7, 8, 5, 5, 4, 1 and 5 goals. What was the mean score?
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Hw.2 The following table lists the number of people killed in traffic accidents over a 10 year period. During this time period, what was the average number of people killed per year? How many people died each day on average in traffic accidents during this time period? Table 1. Number of fatalities in traffic accidents Year Fatalities 1 959 2 1,037 3 960 4 797 5 663 6 652 7 560 8 619 9 623 10 583
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HW 3 In an office there are 84 employees. Their salaries are given Below 1.Find the mean salary of the employees 2.What is the total salary of the employees
In the frequency distribution of 100 families given below the number of families corresponding to the expenditure groups and 60-80 are missing from the table.However the mean of the distribution is known to be 50.Find the missing frequencies
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