Concept explainers
To construct: A set of numbers that have the given measures of central tendency.

Answer to Problem 68E
The set of numbers is {3,4,4,4,15} .
Explanation of Solution
Given:
Mean is 6, Median is 4 and Mode is 4.
Calculation:
Base on the given measures, there can be many possible sets. One such set is determined as shown below:
1) Given that the mean is 6, the average of the numbers should be equal to 6.
2) For the median to be 4, the center value should be 4 when the data is arranged either is ascending or descending order. Assume that the data is arranged in ascending order and for convenience point of view, let there be 5 numbers, out of which the 3rd number is 4.
3) To determine the other 4 numbers, the value of mode proves to be further useful. Since mode is the most frequently occurring number, let 4 be repeated a total of 3 times. So now all is left to determine the remaining 2 numbers in the data set. Let those be represented by x and y.
By point 1,
x+4+4+4+y5=6x+y+12=30x+y=18
Since the data is arranged in an ascending order, the value for x has to be less than 4. So, x can take the values 1, 2 or 3. Let x=3 . Then y=15 .
So, the data set is {3,4,4,4,15} .
Chapter 13 Solutions
EBK PRECALCULUS W/LIMITS
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