Question

the following data is the heights (in inches)of pupils in a 10th grade classroom 57,64,66,66,67,69,71,72,73,75,75what is the mean,median,mode,and range?

Answer 1

We have the following info given:

57,64,66,66,67,69,71,72,73,75,75

We can start with the masn given by this formula:

$\text{Mean}=\frac{\sum ^{\infty}_{i\mathop=1}x_i}{n}$

And replacing we got:

$\text{Mean}=68.64$

For the mode we can see that we have two values 66 and 75

For the median we just need to select the middle value (at position 6) from the data ordered and we got:

$\text{Median}=69$

and for the range we can use this definition:

$\text{Range}=\text{Max}-Mi$

And replacing we got:

$\text{Range}=75-57=18$