## Exam-Style Question on Statistics## A mathematics exam-style question with a worked solution that can be revealed gradually |

Question id: 211. This question is similar to one that appeared on an IB Studies paper in 2015. The use of a calculator is allowed.

The times taken in seconds by a group of students to complete an online exercise are listed as follows.

$$31, 34, 41, 33, 29, 31, 39, 35, 30, 40.$$(a) Find the median time.

(b) Calculate the interquartile range.

(c) Find the probability that a student chosen at random from the group took at least 35 seconds to completed the exercise.

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