Here Is the Boxplot and an Ogive of the Distribution

question 107

Multiple Choice

Here is the boxplot and an ogive of the distribution of students marks on their statistics test. Write a few sentences describing this distribution.

• A)The distribution of the marks is slightly skewed to the left.The median mark was about 48,with a max of 100 and a min of 0.The middle 50% of the marks appeared to range from 18 to 75,for an IQR of 57.55% of the students had a mark less than 50.
• B)The distribution of the marks is slightly skewed to the left.The median mark was about 48,with a max of 100 and a min of 0.The middle 50% of the marks appeared to range from 26 to 66,for an IQR of 40.About 55% of the students had a mark less than 50.
• C)The distribution of the marks is slightly skewed to the right.The median mark was about 48,with a max of 100 and a min of 0.The middle 50% of the marks appeared to range from 26 to 66,for an IQR of 40.About 55% of the students had a mark greater than 50.
• D)The distribution of the marks is slightly skewed to the left.The median mark was about 48,with a max of 100 and a min of 0.The middle 50% of the marks appeared to range from 26 to 66,for an IQR of 40.About 55% of the students had a mark greater than 50.
• E)The distribution of the marks is slightly skewed to the right.The median mark was about 55,with a max of 100 and a min of 0.The middle 50% of the marks appeared to range from 26 to 66,for an IQR of 40.About 55% of the students had a mark less than 50.

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Definitions:

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Effectiveness Studies

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Randomized Clinical Trials

Methodologically rigorous studies where participants are randomly assigned to different treatments to evaluate their effectiveness.

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