Aux24 probability student range

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Discussion Overview

The discussion revolves around interpreting a frequency chart of test scores from Ms. Hernandez's science students, specifically focusing on the cumulative number of students whose scores fall within certain ranges. Participants are attempting to determine how many students scored in the interval of 71-80 based on the provided data.

Discussion Character

  • Debate/contested

Main Points Raised

  • One participant suggests that since 12 students scored in the range 65 to 70 and 13 scored in the range 65 to 80, it implies that only 1 student scored in the range 71 to 80.
  • Another participant expresses confusion about the interpretation of the data and questions the reasoning behind concluding the number of students in the 71-80 range.
  • A different participant introduces a concept of a "linear" Venn diagram, possibly to clarify the relationships between the score ranges.
  • One participant corrects another by emphasizing that the ranges are distinct and that 65 is not equal to 71, indicating a misunderstanding in the interpretation of the cumulative scores.

Areas of Agreement / Disagreement

Participants exhibit disagreement regarding the interpretation of the cumulative score data, with no consensus reached on how to accurately determine the number of students in the 71-80 range.

Contextual Notes

Participants express uncertainty about the equations or methods needed to derive the number of students in specific score intervals, relying on observation and interpretation of the cumulative data.

karush
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The frequency chart below shows the cumulative number of Ms. Hernandez's science students
whose test scores fell within certain score ranges All test scores are whole numbers.
Cumulative number Score range of students

$\begin{array}{lll}
&65-70& 12\\
&65-80& 13\\
&65-90& 19\\
&65-100& 21
\end{array}$
a.1 b.6 c.8 d.12 e.13
How many students have a test score in the interval 71-80

ok I guessed this to be 13 but ?
what about students who in the 65-71 range
I don't know of any equation to figure this other than just observation
 
Last edited:
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12 students scored in the range 65 to 70
13 students scored in the range 65 to 80

wouldn't that mean only 1 student scored in the range 71 to 80 ?
 
sorry i don't get it
 
call it a "linear" Venn diagram ...

score_range.jpg
 
That helps :cool:
 
Why would you read "13 students have grades in the range of 65 to 80" and conclude that "13 students have grades in the range 71 to 80"? 65 is NOT 71!

13 students have grades in the range 65 to 80 but 12 of those have grades in range 65 to 70.
 

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