Hi everyone! I am currently revising for a statistics exam and am struggling with one particular practice question. I have attached a screenshot of the info that was provided.
The practice exam question is as follows:
Which of the following cannot be determined from the table of descriptive statistics in the block introduction:
 variance
 number of observations
 range
 IQR (interquartile range)
Our teacher told us that IQR is the correct answer. I initially thought that we could calculate the IQR by using the data in the graph. But I now understand that the data in the graph does not constitute descriptive statistics.
My question is, however, how can I calculate the variance based on the descriptive statistics only (so without using the data in the graph)? I can only seem to find examples of how to calculate this by using the data set.
Thanks in advance for your help!
Mir
The practice exam question is as follows:
Which of the following cannot be determined from the table of descriptive statistics in the block introduction:
 variance
 number of observations
 range
 IQR (interquartile range)
Our teacher told us that IQR is the correct answer. I initially thought that we could calculate the IQR by using the data in the graph. But I now understand that the data in the graph does not constitute descriptive statistics.
My question is, however, how can I calculate the variance based on the descriptive statistics only (so without using the data in the graph)? I can only seem to find examples of how to calculate this by using the data set.
Thanks in advance for your help!
Mir
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