Mathematics, 29.08.2019 18:30, lizzbugg9880

Me with the attached document. (lower quartile)

Answers: 2

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Put in order

16,19,23,24,25,31,37,46,47

so
lower IQR = (16+19+23+24)/4 = 82/4 = 20.5

answer lower IQR =20.5

in case you need it

Upper IQR = (31+37+46 + 47) = 161/4 = 40.25
median = 25

answered: derekcalhoun4943

Hey there!

The first thing you need to do is put your numbers in order from least to greatest:

16, 19, 23, 24, 25, 31, 37, 46, 47

Then, you need to cut the numbers into quarters. I would do this by finding the middle number or your mean, which is 25, then counting out to see which number is in the middle on either side. Your new groups that you have to find the middle number of are in brackets, and your middle number is bolded. Your lower quartile will be within the left/lower set of numbers.

[ 16, 19, 23, 24, ] 25, [ 31, 37, 46, 47 ]

The lower quartile would be the mean between 19 and 23, since that would split the lower group directly in half.

19 + 23 = 42
42 / 2 = 21

So, your lower quartile would be 21.

Hope this this was clear enough and helped you out! Feel free to ask me any additional questions if you have any. :-)

answered: Guest

starting with:

5 + x - 12 = 2x - 7

5 + x - 12 - x = 2x - 7 - x (subtract x from both sides)

5 - 12 = x - 7 (combine and cancel x's from both sides)

5 - 12 + 7 = x - 7 + 7 (add 7 to both sides)

0 = x (add numbers together on both sides)

so in order for the equation to be true, x must be 0.

trying x = -0.5

5 + x - 12 = 2x - 7 (original equation)

5 + -0.5 - 12 = 2(-0.5) - 7 (plug in value of x)

5 + -0.5 - 12 = -1 - 7 (did multiplication)

-7.5 = -8 (did addition on both sides)

since -7.5 is obviously not equal to -8, the value of -0.5 for x is wrong.

trying x = 0

5 + x - 12 = 2x - 7 (original equation)

5 + 0 - 12 = 2(0) - 7 (plug in value of x)

5 + 0 - 12 = 0 - 7 (did multiplication)

-7 = -7 (did addition on both sides)

since -7 equals -7, that demonstrates that the value of 0 for x is correct.

trying x = 1

5 + x - 12 = 2x - 7 (original equation)

5 + 1 - 12 = 2(1) - 7 (plug in value of x)

5 + 1 - 12 = 2 - 7 (did multiplication)

-6 = -5 (did addition on both sides)

since -6 is obviously not equal to -5, the value of 1 for x is wrong.

answered: Guest

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Me with the attached document. (lower quartile)
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