Question

using the set of numbers find the mean rounded to the nearest tenth , median , mode and range.82 , 89 ,77 , 77 , 81 , 77 , 72 , 70

Answer 1

Mean:

Sum all the data and divide into number of data (8):

$\frac{82+89+77+77+81+77+72+70}{8}=\frac{625}{8}=78.1$Mean: 78.1

Median:

Order from less to geatest the data:

$70,72,77,77,77,81,82,89$

As the number of data is an odd number you chosse the two terms in the middle and find the average (sum the terms and divide into 2):

$\frac{77+77}{2}=77$Median: 77

Mode:

The mode is the data that repeat most times.

In this case the data 77 repeats 3 times

Mode: 77

Range:

Substract the smallest number from the largest number:

$89-70=19$Rangle: 79