Math Worksheets

Archive for May, 2009

Question: what is the relationship between quartiles and box and whisker plots?

My math teacher gave me a worksheet on this, and he’s not a very good math teacher, and he didn’t go over it or explain it to the class, and I’m really confused about it. Can anyone help me? I figured it would be as simple as the upper and lower quartiles were the whiskers on the diagram, but everyone says that’s not it. A little help here?

Please and thank you.

Answer: The first dot far left (beginning of whisker) is Lower Extreme
The left line is called the 1st quartile
The middle line between the two boxes is the Median called the 2nd quartile
The right line is called the 3rd quartile
The last dot far right ( end of whiskers) is Upper Extreme

Box and whisker plot

Question: Did everything that you learn in high school help you alot in college?

I am a high school senior currently taking a CP chemistry class. My teacher is so LAZY that I don’t I have learned anything so far. She only gives us worksheet and read the textbook by ourselves. She only teaches how to do stuff like once a week. I feel like I am not learning as much as I am supposed to. Next year I will be going to community college and planning on majoring in chemistry then continue to pharmacy school. In community college I know i have to take a placement test, but I am not sure if its going to be in chemistry or just english and math. I have a pretty good math background and currently studying pre-calculus. I am just scared that I will not understand anything once I start learning chemistry in college due to this unfortunate situation. What do you think?. Do I really need a strong background in chemistry to do well in college?

Answer: High school was a total waste of time for me. I took a ton of AP classes and can tell you that they are a joke compared to college. I learned a great deal while in high school because I spent most of my time working (and actually became the youngest regional sales manager for a major brand).

Colleges understand that kids are coming from different quality schools and are going to invest significant amounts of time for the first few weeks to get everyone onto the same page. Don’t worry about it.

Math Video: Derivatives

1. Your math grades may be based on The Average of all your test scores. In sports, you might want to find out The Average height of players on your favorite basketball team. 
2. To find an average, add up a list of all numbers and divide the sum by the number of items on the list. 
3. The Average of 1 to 10 is:
   • 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10 = 55
   • 55 ÷ 10 = 5.5
   • The Average of 1 to 10 is 5.5.
   • Note that The Average does not have to be a whole number.
4. The Average of class I scores is 7.8. The Average of class II score is 8. So, class II did better than class I on average. 
5. The Average temperature this week is 79.43 (to 2 decimal point of accuracy). 
6. The Average weight of Anna’s bags is 9.83 (recurring). Recurring in math means the number repeats to infinity. 9.83 recurring means the actual number is 9.8333333333333333333…
7. The Average size of Mike’s TVs is 28″.
8. This problem is a little different from the rest. Since there are 12 inches in a foot, we cannot simply add the heights together.
   • For example, adding 5′ 0″, 4′ 9″, and 3′ 6″ together does NOT equal 13.5′ or 13.5″ or 13′ 5″.
   • When adding height, you need to add feet and inches separately. In this case, the average height is 5 + 4 + 3 = 12 foot and 0 + 9 + 6 = 15 inches.
   • There are three heights so your averages are 12 ÷ 3 = 4 foot and 15 ÷ 3 = 5 inches.
   • The average height is 4′ 5″.
   • If you simply want to find the sum of the heights, then do the following:
   • You know that there are 12 inches in 1 foot. 15 inches is equal to 12 inches + 3 inches. Therefore, 15 inches = 1 foot + 3 inches.
   • The sum of all heights is: 5′ 0″ + 4′ 9″ + 3′ 6″ = 13′ 3″
9. James’ average score is 588.5.
10. Linda’s cookies have the average diameter of 4.292 cm.

Click here for Math Worksheets problems on the Average 

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