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IB Maths AI SL 4.3 Summary Statistics Questions

Practise calculating mean, median, grouped-data estimates, variance, standard deviation and IQR, including how shifting or scaling data changes spread.

Syllabus
First assessment 2021
Course
Mathematics: applications and interpretation SL
Level
SL

Exam points

  • Calculate or estimate mean, median, mode/modal class and grouped-data mean from a dataset or frequency table.
  • Calculate and interpret variance, standard deviation, range or IQR, using technology where appropriate.
  • Explain how adding, subtracting or scaling all data values changes summary statistics and spread.

Learn this topic

Study SL 4.3—Summary statistics conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Maths AI SL 4.3 Summary Statistics Questions question 1

[Maximum number: 5]

Elsie, a librarian, wants to investigate the length of time, T minutes, that people spent in her library on a particular day.

Question (a)

(a)

Write down the modal class.

[ 1 ]

Question (b)

(b)

Write down the mid-interval value for this class.

[ 2 ]

Question (c)

(c)

Use Elsie's data to calculate an estimate of the mean time that people spent in the library.

[ 2 ]
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