Question

He following stem-and-leaf plot represents the test scores for 26 students in a class on their most recent test. Use the data provided to find the quartiles.
Test Scores by Student
Stem Leaves
6 2 4 4 6 7 9
7 1 2 4 7 8
8 4 4 5 5 6 7 7 8
9 0 0 1 3 4 7 8
Key: 6|2=62

Step 1 of 3 : Find the second quartile.

Answer 1

Considering the given stem-and-left plot, the median = second quaritle of the data set is of 84.5.

What is the median of a data-set?

The median of a data-set is the 50th percentile, that is, the value that separates the bottom 50% of scores from the upper 50% of scores.

This data-set has even cardinality of 26, hence the median is the mean of the 13th and 14th scores, which, considering the key for the stem-and-leaf plot, are 84 and 85, hence:

Me = (84 + 85)/2 = 84.5.

More can be learned about the median of a data-set at brainly.com/question/23923146

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