[填空题]
The table below shows the time, in minut2 oge*iiz*5 p q pxavmh1ii(28/vbn b2es, taken to complete ;r3yy ideh: 4zpo:/ gfa Statistics test by a group of 100 stud 4d: yr;i/z 3gopfyhe:ents.
1. Write down the value of x .
2. Use the time interval midpoints to estimate the average time taken to complete the test. The time taken to complete the test is displayed on the cumulative frequency graph below. minutes
3. Estimate the median time of test completion. minutes
4. Estimate the number of students that spend at least 30 minutes on the test.
5. Calculate the interquartile range.
6. Draw a box-and-whisker diagram for this data.
7. Determine if a student who takes 5 minutes to complete the test would be considered an outlier.(a,b) a= b=
