Answer :
Answer:
Okay, let's go through the questions one by one:
1. Write the tally for 21.
The tally for 21 is: HHHHH
2. What number does this tally represent?
The tally HHHHH represents the number 25.
3. What number does the tally | ## || represent?
The tally | ## || represents the number 13.
4. What is the median of the numbers 7, 4, 5, 8, 10, and 5?
To find the median, we need to arrange the numbers in ascending order: 4, 5, 5, 7, 8, 10.
The median is the middle number, which in this case is 7.
5. The mode of the set of numbers 2, 3, 4, 6, 7, 7, 7, 7, 8, 9 is 7.
6. The median of the set of numbers 2, 3, 4, 6, 7, 7, 7, 7, 8, 9 is 7.
7. The arithmetic mean of the set of numbers 2, 3, 4, 6, 7, 7, 7, 7, 8, 9 is:
Sum of all numbers = 2 + 3 + 4 + 6 + 7 + 7 + 7 + 7 + 8 + 9 = 60
Number of numbers = 10
Arithmetic mean = 60 / 10 = 6
