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Box & Whisker Plot Notes Absent 1/31-2/1PowerPoint Presentation

Box & Whisker Plot Notes Absent 1/31-2/1

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Box & Whisker PlotNotesAbsent1/31-2/1

Example 1

Mr. Halls test scores:

77, 99, 100, 67, 90, 55, 86,

78, 72, 48, 27, 88, 24, 95

60, 63, 82, 94, 82

24, 27, 78, 55, 60, 63, 67, 72, 77, 78, 82,

82, 86, 88, 90, 94, 95, 99, 100

20 30 40 50 60 70 80 90 100

24 60 78 90 100

Range: 76%

Inter Quartile range: 30%

- Step 1: Put test scores least to greatest.
- Step 2: Make a number line with test scores.
- Step 3: Put a dot at the min. and max. test score.
- Step 4: Make a line at the median test score.
- Step 5: Make a line at the lower and upper quartiles. Take the median of the lower half and upper half of test scores.
- Step 6: make a box with the lines.

Questions from example 1

- What percent of students scored higher than 78%?
50% scored higher

2. What percent of students scored higher than 60%?

75% scored higher

3.What percent of students scored lower than 60%?

25% scored lower

4. What percent of students scored higher than 90%?

25% scored higher

5. What percent of students scored lower than 90%?

75% scored lower

6. What percent of students scored 24% or higher?

100% scored higher

Example 2

- Mrs. Hall’s test scores:
47, 65, 50, 56, 68, 51, 36, 63, 45, 53, 59

36, 45, 47, 50, 51, 53, 56, 59, 63, 65, 68

30 40 50 60 70

36 47 53 63 68

Range: 32 %

Inter Quartile range: 16%

- Step 1: Put test scores least to greatest.
- Step 2: Make a number line with test scores.
- Step 3: Put a dot at the min. and max. test score.
- Step 4: Make a line at the median test score.
- Step 5: Make a line at the lower and upper quartiles. Take the median of the lower half and upper half of test scores.
- Step 6: make a box with the lines.

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