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Free NAPLAN Numeracy Practice: Statistics — Year 9 (10 Questions, Instant Results)

A single-topic check for Year 9 NAPLAN Numeracy: 10 multiple-choice questions on statistics, selected from 13 items our tutors have checked, marked on the page with explanations. It is one of the 3,261 free practice questions across our whole bank, and there is nothing to sign up for.

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✅ Victorian Curriculum aligned⚡ Instant marking + explanations📚 3,261 free practice questions

Free practice quizzesNAPLAN Numeracy Year 9 quiz › Statistics

How NAPLAN tests statistics in Year 9

NAPLAN reports a Year 9 result in four proficiency levels, and the difference between Developing and Strong is usually a handful of specific skills. Statistics is one of the areas where our tutors see that gap most often. Use this single-topic quiz to test it directly, then the mixed NAPLAN quiz to see how it holds up alongside everything else.

What statistics covers in Year 9 NAPLAN Numeracy

Before the quiz, here is what the topic means at this level. Year 9 statistics covers measures of centre and spread, histograms and back-to-back stem-and-leaf plots, comparing data sets, identifying outliers and questioning how samples were collected.

Every question on this page was written to a specific Victorian Curriculum reference for Year 9 and checked by an RHZ tutor before it could be served.

Where Year 9 students go wrong with statistics

Most errors in statistics are not random. When Year 9 students sit our Skills Check, the same handful of misunderstandings account for the majority of lost marks:

Each of these is fixable in a session or two once it has been named, which is why the results panel below shows the correct answer and an explanation rather than just a score.

What to do if statistics needs work

Three things a parent or student can do this week:

  1. Practise reading histograms with unequal class widths.
  2. Discuss surveys in the news and how the sample was chosen.
  3. Calculate the mean from a frequency table by hand once, then with a spreadsheet.

For Years 7 to 10, practise the way a test is sat: mixed questions, time limits, full working. Then mark it honestly and re-do the errors.

How the 10 questions are chosen

Every set on this page is a seeded selection of 10 from the 13 statistics questions that pass our quality gate. A different seed gives a different set, and there are many more combinations than any one student will need. The correct answers never appear in the page source; the browser asks our server for them after you press Mark my answers.

Because every question here is on statistics, a low score is a clear signal and a high score is genuinely reassuring for this topic. What it cannot tell you is whether the other Year 9 NAPLAN Numeracy topics are equally secure, or how far above the year level the student can go; the free Skills Check covers both.

The quiz: 10 questions

Choose one answer for each question, then press Mark my answers. Set 42656 · New set of questions →

Question 1
Statistics

A fair die is rolled. What is the probability of a number greater than 4?

Question 2
Statistics

Find the range of 12, 5, 20, 8.

Question 3
Statistics

Find the median of 4, 8, 15, 16, 23, 42.

Question 4
Statistics

A data set contains 10 values. The mean is 20 and the median is 18. One new value is added. After the addition, the mean is still 20. What is the new value?

Question 5
Statistics

The mean of four numbers is 10. Three of them are 8, 9, 12. Find the fourth.

Question 6
Statistics

The ages (in years) of seven people are: 14, 15, 15, 16, 17, 18, 62. Which statement about this data set is correct?

Question 7
Statistics

Find the mode of 3, 7, 7, 2, 9.

Question 8
Statistics

Find the median of 9, 3, 7, 1, 5.

Question 9
Statistics

Adding a very large outlier to a data set most affects the:

Question 10
Statistics

Find the mean of 4, 8, 6, 2.

How to read a score out of 10

9 or 10 out of 10
The easy and at-level content is secure. The useful question now is how far above the year level the student can go, which a ten-item quiz cannot show. The free Skills Check adds stretch and challenge questions on every topic so you can see the ceiling as well as the floor.
7 or 8 out of 10
Solid, with one or two specific gaps. Look at which topic the incorrect answers came from (the results panel names the weakest topic) and spend a week on that topic before re-testing with a different seed.
5 or 6 out of 10
Some core ideas are shaky. The pattern matters more than the score: two misses in the same topic is a gap; misses scattered across topics usually means reading the question too fast. Either way, the Skills Check will tell you which.
4 or fewer out of 10
Foundations from an earlier year are probably missing, which is common and fixable. Try the quiz one year level down to confirm, then talk to a tutor about a short catch-up plan rather than more of the same practice.

What to do with the result

1. Want the full picture?

The free Skills Check takes about 15 minutes, covers every Year 9 topic including stretch and challenge questions, and sends a same-day topic-by-topic report. A tutor calls to walk you through it, no obligation.

Start the free Skills Check →

2. Printable practice with answers

Our Year 9 practice papers are full-length, curriculum-aligned and come with worked answers, so a student can practise on paper the way the real test is sat.

Browse practice papers →

3. Tutoring in Melbourne's west or online

Small groups from $25 an hour and 1:1 from $35 an hour at our Truganina centre, or online anywhere in Australia. Same tutors, same Skills Check, same progress notes either way.

See NAPLAN tutoring → All tutoring →

Questions? Call 03 9509 3293 or book a free consultation. RHZ Tutoring, 17/47 Apex Drive, Truganina VIC 3029.

Frequently asked questions

Is this Year 9 statistics quiz free?

Yes, completely: no sign-up, no email, no payment, and you can take it as many times as you like. It is one of 3,261 free practice questions RHZ Tutoring publishes across Prep to Year 12. Press New set of questions, or add ?seed= to the address, for a different selection from the same topic.

Why only 10 questions on one topic?

Because a single-topic set is the most precise free check available: if the score is low, the gap is in statistics and nowhere else. There are 13 eligible questions on this topic in our Year 9 NAPLAN Numeracy bank, so several different sets are available before any repeat.

Where do the statistics questions come from?

From RHZ Tutoring's own Year 9 NAPLAN Numeracy question bank, written to the Victorian Curriculum, checked by a tutor and passed through an automated quality gate. The same bank feeds our tutoring sessions and the free Skills Check. The questions on this page sit at the easy and at-level tiers.

What should I do if the score is low?

Read the explanation for each incorrect answer first; most gaps in statistics are one of the misconceptions listed on this page. Then try a second set a few days later. If it is still low, the free Skills Check will show whether the gap is confined to this topic, and a tutor can build a short catch-up plan.

Is there a mixed Year 9 NAPLAN Numeracy quiz?

Yes. The Year 9 NAPLAN Numeracy quiz spreads ten questions across every topic for the year, and the hub lists topic quizzes for every year level from Prep to Year 12.

Other NAPLAN Numeracy topics for Year 9

Mixed NAPLAN Numeracy Year 9 quiz (all topics) →

All 3,261 free practice questions, Prep to Year 12 →