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ch4aika [34]
3 years ago
9

Heyyy...need ur help...again cause I'm uneducated

Mathematics
2 answers:
USPshnik [31]3 years ago
5 0

Answer:

c

Step-by-step explanation:

lesya692 [45]3 years ago
4 0

Answer:

A and D

That is the answer.

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The following stem-and-leaf plot represents the test scores for
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Considering the given stem-and-leaf plot, the quartiles are given as follows:

  • The first quartile is of 67.5.
  • The second quartile, which is the median, is of 84.5.
  • The third quartile is of 91.5.

<h3>What are the median and the quartiles of a data-set?</h3>

  • The median of the data-set separates the bottom half from the upper half, that is, it is the 50th percentile.
  • The first quartile is the median of the first half of the data-set.
  • The third quartile is the median of the second half of the data-set.

There is an even number of elements(26), hence the median is the mean of the 13th and 14th elements, which are 83 and 86, hence:

Me = (83 + 86)/2 = 84.5.

The first half has 12 elements, hence the first quartile is the mean of the 6th and 7th elements, which are 67 and 68, hence:

Q1 = (67 + 68)/2 = 67.5.

The third half also has 12 elements, starting at the second 86, hence the third quartile is the mean of the 6th and 7th elements of this half, hence:

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More can be learned about the quartiles of a data-set at brainly.com/question/28017610

#SPJ1

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