What is the interquartile range of 77 88 92 81 86 84 86 83 and how do you get it thx plz help

1 answer:

6 0

To find the IQR you first need to write it in numerical order

77, 81, 83, 84, 86, 86, 88, 92

IQR is just Q3 - Q1

Q1 is the middle of the first have, since it has an even set of 4 numbers in the first half you need to take the average of the two middle ones.. which is 82

Q3 done the same process would be 87.

87 - 82 = 5

IQR = 5

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Solution I.) Substitution

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Now we can substitute the y in the second equation with 9-2x

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