Range, quartiles and Interquartile range

Using the graph, which of the following is the estimation of the first quartile?

If the first quartile =10 and the IQR =30, calculate the upper quartile (Q₃)

give your answer as a figure.

(a)  

If the first quartile =10 and the IQR =30,as shown in the given cumulative graph, which of the following must be true about the median?

Using the given cumulative frequency graph, which of the following is the estimation of the median?

The following cumulative frequency graph represents the grades of a class in a math test.

Using the graph, determine which of the following is the estimation of the median.

Using the given cumulative frequency graph, find the estimation of the IQR.

The following data represents the height of some students in a high school. Use the cumulative frequency graph to estimate the median.

Hint; Draw a cumulative frequency graph

The table shows the average monthly temperature for St. Louis. The lower quartile (Q1) for this data is (a)   .

The table shows the average monthly temperature for St. Louis. The median for this data is (a)   .

The table shows the average monthly temperature for St. Louis. The upp er quartile (Q3) for this data is (a)   .