Math Problem Statement

Find the 5-number summary for the data shown: [4, 11, 14, 17, 27, 46, 47, 51, 55, 80, 83, 85, 93, 98].

Solution

To find the 5-number summary for the data given, let’s go through each component. The 5-number summary consists of:

  1. Minimum: The smallest value in the data set.
  2. Q1 (First Quartile): The median of the lower half of the data (25th percentile).
  3. Median (Q2): The middle value of the data set (50th percentile).
  4. Q3 (Third Quartile): The median of the upper half of the data (75th percentile).
  5. Maximum: The largest value in the data set.

The provided data, in ascending order, is: 4,11,14,17,27,46,47,51,55,80,83,85,93,984, 11, 14, 17, 27, 46, 47, 51, 55, 80, 83, 85, 93, 98

Step-by-Step Solution:

  1. Minimum: 44
  2. Maximum: 9898

To find the quartiles, we’ll use the following steps:

  • Median (Q2): Since there are 14 values, the median will be the average of the 7th and 8th values. Median (Q2)=47+512=49\text{Median (Q2)} = \frac{47 + 51}{2} = 49

  • First Quartile (Q1): The first quartile is the median of the lower half (first seven values: 4,11,14,17,27,46,474, 11, 14, 17, 27, 46, 47). Q1=17Q1 = 17

  • Third Quartile (Q3): The third quartile is the median of the upper half (last seven values: 51,55,80,83,85,93,9851, 55, 80, 83, 85, 93, 98). Q3=83Q3 = 83

Final 5-Number Summary:

  • Minimum: 44
  • Q1: 1717
  • Median (Q2): 4949
  • Q3: 8383
  • Maximum: 9898

So, the correct answers should be: 4,17,49,83,984, 17, 49, 83, 98

Let me know if you’d like more details on any of these steps!


Here are some related questions that might deepen your understanding:

  1. How do you find quartiles for an odd number of data points?
  2. What is the interquartile range, and how is it calculated?
  3. How do outliers affect the five-number summary?
  4. How can you use a boxplot to represent the five-number summary visually?
  5. What is the difference between quartiles and percentiles?

Tip: Always arrange your data in ascending order before finding the five-number summary.

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Math Problem Analysis

Mathematical Concepts

Descriptive Statistics
Five-Number Summary
Quartiles

Formulas

Median: middle value of an ordered data set
Q1: median of the lower half of the data
Q3: median of the upper half of the data

Theorems

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Suitable Grade Level

Grades 9-12