QUESTION 7 The axam scores (out of 100 points) for 20 students takng a blostatis

Question

QUESTION 7 The axam scores (out of 100 points) for 20 students takng a blostatistics course are used to construct the following boxplot Based on this boxplot which of the follawing statements is true? O The etudent scoring 25 is an outier About one quarter uf the students scored beluw 63 The interquartic range (IOR)is approximately 40 Thn distribution of exam scaras is fairly symmatric QUESTION 8 The axam score out of 100 points) fr 20 students taking a biostatistics course are used to construct the folowing boxplot tha following boxplot Screenshot save The screenshot OneDrive.

Explanation / Answer

Question 7:

Here 25 is not an outlier because the outlier in a box plot is given as a cross market even below the horizontal line of the stem. Therefore the first statement is not true.

Here 63 is the value that is represented as the dark horizontal black line at the middle of the box. Therefore this is the median value. Therefore about half of the students scored below 63 and not one quarter. Therefore the second statement is also not true.

The interquartile range here is not 40 as IQR is actually the length of the box which is clearly way less than 40 in the boxplot.

The distribution is clearly symmetric because the dark medianis right at the middle of the box and also the horizontal lines at the ends are at equal distance from the box. Therefore d) is the correct statement here as the distribution is symmetric here.

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