Math plz

@ColorParrot

1. Think of a number line. Let's say you have a set of data, and you plot it in the number line. First, you calculate the mean (arithmetic) of the data. Plot this on the number line too. Now, take the sum the distances between each data point and the mean value, and divide it by the number of values to get the MAD. Oversimplified, it's
   MAD = [sum of distances of each point (x_i) from the mean (x bar)]/number of data values (n).

Basically, you can use the MAD formula to calculate any MAD :) Here's an example:
Q) Find the MAD of 6, 7, 12, 13, 8
A) Mean = 9.2
Each distance from mean = 3.2, 2.2, 2.8, 3.8, 1.2
Thus, MAD = Mean of distances/5
= 13.2/5 = 2.64

2. Suppose you have some data. Visualize this: the median divides the data into two parts (not necessarily equal). Now, by the same rule, the upper quartile divides the part with greater values into two more parts, and the lower quartile divides the lesser part into two more parts, so we have four parts. The difference between the upper quartile and the lower quartile is the inter-quartile range. So, if the upper quartile's 73 and lower quartile's 23, the inter-quartile range is (73 - 23) = 50.

Since it is technically a measure of central tendency, it is close to the median (it may be equal with some particular data, but not necessarily).

√4 x 24 find the mean and inter quartile range. The sqrt of 4 is 2 et 2 x 24 = 48

thx @ForumMathSolver

does anyone know iqr?

@CCAK0123456789 said in #6:

What is 1+1?

Sent this almost a day ago and no one has replied!
Is it really that hard??

I am 3rd grader I am the smartest kid in class and I wonder if this equation will come 7890008755800x9976512247900

It’s window or 11 or 2

@CCAK0123456789 said in #14:

Sent this almost a day ago and no one has replied!
Is it really that hard??

11

@Saisamar16 :
7890008755800x9976512247900

You just need to know 9976512247900 x 8, 9976512247900 x 7, 9976512247900 x 5 and 9976512247900 x 9.

They are, respectively, after a bit of multiplication and subtraction, 79812097943200 (which you can get by repeated doubling of 9976512247900), 69835585695300 ((9976512247900 x 8) - 9976512247900) , 49882561239500 (9976512247900 x 10 divided by 2) and 89788610231100 ((9976512247900 x 10) - 9976512247900).

So, here goes:
9976512247900 x 800 = 79812097943200 x 100 = 7981209794320000.
9976512247900 x 5000 = 49882561239500 x 1000 = 49882561239500000.
9976512247900 x 50000 = 49882561239500 x 10000 = 498825612395000000.
9976512247900 x 700000 = 69835585695300 x 100000 = 6983558569530000000.
9976512247900 x 8000000 = 79812097943200 x 1000000 = 79812097943200000000.
9976512247900 x 90000000000 = 89788610231100 x 10000000000 = 897886102311000000000000.
9976512247900 x 800000000000 = 79812097943200 x 100000000000 = 7981209794320000000000000.
9976512247900 x 7000000000000 = 69835585695300 x 1000000000000 = 69835585695300000000000000.

7981209794320000 + 49882561239500000 + 498825612395000000 + 6983558569530000000 + 79812097943200000000 + 897886102311000000000000 + 7981209794320000000000000 + 69835585695300000000000000. Wow...

That...drumroll please...adds up to...78714769924276396158820000.

wth i asked for MAD and IQR not this garbage

@ColorParrot said in #1:

Could you help I need advice? I'm doing California test for 6th grade. I am doing CAASPP testing math. I suck at MAD and IQR. plz help

wow my class literally just had caaspp lol