Answer:
Step-by-step explanation:
1) 12
The mean of any number series is all of them added together and divided by the amount of numbers there are, when you add all the numbers together you get 96, and you divide it by 8 because that's how many numbers there are.
2) 5
Range is the distance between the smallest and largest number in the series, there is a difference of 5 between 10 and 15.
3) mean: 12 mode: 13, the mode is larger
The median is found by writing the numbers down in order and ticking off the number on each side back and forth until you come to the middle, if the number sequence has an even amount of values like it is here, you split the difference of the two middle numbers. The two middle numbers this time are 11 and 13 so you find the middle which is 12. The mode is the number that appears most frequently, which is 13, which means that the mode is greater than the mean.
4) Joanne's dance class' youngest student(s) are 13 years old, but the difference between the youngest and the oldest student will still be 5 so the oldest member(s) of the dance class are 18.
<em>hope this helped</em>
