Question

Alicia received the following seven scores on her math assignments.

Answer 1

The median is your answer. Hope this helps.

Answer 2

The given set of data is

$80, 90, 10, 75, 90, 95, 99$

As we know , Mean is defined as the sum of the given numbers divide by the total number of numbers.

Hence we can write

$Mean=\frac{80+90+10+75+90+95+99}{7}\\ \\ \text{here total number of numbers=7}\\ \\ Mean= \frac{539}{7}= 77\\ \\ \text{Hence the mean of the given set of data is }77\\ \\ \text{Now to find the median of the given set of data , rearrange the numbers}\\ \text{ in descending order}\\ \\ 99,95,90,90,80,75,10\\ \\ \text{If the total number of number is odd, in this case 7, then the median is the }\\ \text{number in middle.}\\ \\ \text{Hence the median of the given set of data is }90$

As the mean gets affected with the extreme values so median is the best representation of the centre.

Hence its median.