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Exam-Style Question on StatisticsA mathematics exam-style question with a worked solution that can be revealed gradually |
Question id: 4. This question is similar to one that appeared on an IB Standard paper in 2010. The use of a calculator is allowed.
The personal trainer collected data from a randomly selected sample of days. From this he found that the number glasses of water he drank in a day had a mean of 4.35.
| Glasses | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|
| Frequency | 3 | 5 | 5 | 8 | \(x\) | 7 | 6 |
(a) Find the number of days represented by \(x\)
(b) Write down the standard deviation.
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Ali Hussein, Al-Mustansiriyah University, Iraq
Friday, January 19, 2024
"The questions are perfect for beginners learning statistics, well listed to cover all the required topics and skills to learn the basics of the subject. Making it free have additional advantages for students specially those from countries with low-income countries with nor or limited access to online subscription.
Although, thanks for the resource."