Math. How can I make up a data set of at least 12 numbers that have the following landmarks, maximum 18: mode: 7, range: 13, median: 12?

5th grade is NOT the School Subject. You must identify it correctly for the correct volunteer teacher to read your post. It is not I!

Sra

Your Max (highest number) = 18

Your range is 13 so your minimum number in your set =5
You need the mean to = 12 so all twelve numbers in your set have to equal 144 so that the 12 individual numbers will have a mean of 12 (144/12=12).
The mode = 7 - so 7 is going to occur more than once (the mode is the number occurring most often).
A SAMPLE answer is: 5-7-7-7-11-13-13-15-15-16-17-18 (totaled=144/12 = mean of 12); 7 occurs three times so is the mode. There are other combinations

find the range of 78, 9, 100, 6 ?

To create a data set with the given landmarks, you can follow these steps:

1. Start by identifying the mode, which is the number that occurs most frequently. In this case, the mode is 7.

2. Determine the range, which is the difference between the maximum and minimum values. The maximum value is given as 18, and the desired range is 13. So, the minimum value can be calculated as 18 - 13 = 5.

3. Next, we need to place the median, which is the middle value of the data set once it is ordered. The median is given as 12.

4. Now, let's create a list containing 7 as the mode and 12 as the median. For example, [7, 12, 12].

5. To satisfy the range requirement, we need to distribute the remaining 10 numbers (12 - 2 = 10) between the minimum and maximum values.

6. Since the minimum value is 5 and the maximum value is 18, we can distribute the remaining numbers between these two values. For example, divide the numbers into two groups: 5 to 12 (minimum to median) and 12 to 18 (median to maximum).

7. Distribute the remaining numbers evenly between the two groups. In this case, we have 10 remaining numbers, so each group will have 10/2 = 5 numbers.

8. Add 5 numbers to each group such that they are evenly spaced. For example, for the first group (5 to 12), you can use the numbers 5, 7, 9, 11, and 12. For the second group (12 to 18), use the numbers 12, 14, 16, 17, and 18.

Combining all the numbers, your data set could be: [5, 7, 7, 7, 9, 11, 12, 12, 12, 12, 14, 16, 17, 18].

Please note that this is just one possible solution, and you can vary the numbers within the given criteria.