Question

using the set of numbers find the mean rounded to the nearest tenth , median , mode and range.68 , 84 , 75 , 81 , 77 , 72 , 71 , 67 , 71

Answer 1

The mean is the quatient between the sum of all the data and the number of data, then:

`\begin{gathered} (68+84+75+81+77+72+71+67+71)/(9)=(666)/(9) \\ =74 \end{gathered}`

To find the median we need to order the data:

67, 68, 71, 71, 72, 75, 77, 81, 84

Once we ordered the data the median is central value, in this case 72.

The mode is the value that repeats itself more, in this case 71.

The range is the substraction between the lowest and highest value, then:

`84-67=17`

Summing up:

Mean: 74

Median: 72

Mode: 71

Range: 17