[填空题]
The table below shows the time, in minfnw 3f;rpm5o4 mv8d +x,:2vw2 x p0d8 qcdbinte vn4b/utes, taken to complete a Statistics test by a group of dv emdncpiv /20t8w +q2 x4vbdn8:,xb100 students.
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=
