Answer:
Upper quartile and Maximum value
Step-by-step explanation:
The first step in creating a box plot is to order the data from least to greatest:
74, 74, 83, 83, 83, 86, 87, 90, 92, 93, 93, 94
Next we find Q2, the median. This is the middle value; in this data set, it is between 86 and 87. This makes it
(86+87)/2 = 173/2 = 86.5
The median splits the data into two halves. The median of the lower half is the lower quartile, or Q1; this value is between 83 and 83. This makes it 83.
The median of the upper half of data is the upper aquartile, or Q3; this value is between 92 and 93. This makes it
(92+93)/2 = 185/2 = 92.5
The lowest value is 74 and the highest value is 94.
This means the upper quartile of the given plot, 92.75, is incorrect, as is the maximum value given, 99. These should be 92.5 and 94, respectively.
