Quizizz statistics quiz featuring multiple-choice questions on calculating mean, median, mode, and range.

Here is the solution to the first 7 questions from your "Quizizz Statistics" worksheet, with a clear explanation for each.

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1. What is the mean of this set of data?
Data: 2, 15, 7

✔ Correct Answer: C) 8

Explanation:
The *mean* (or average) is calculated by adding all the numbers together and then dividing by the count of numbers.

- Sum = 2 + 15 + 7 = 24
- Count of numbers = 3
- Mean = 24 ÷ 3 = 8

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2. Find the median of these numbers:
Data: 2, 3, 4, 5, 5, 7

✔ Correct Answer: D) 5

Explanation:
The *median* is the middle value when the numbers are arranged in order (which they already are).

- There are 6 numbers (even count), so the median is the average of the two middle numbers.
- The two middle numbers are the 3rd and 4th: 4 and 5
- Median = (4 + 5) ÷ 2 = 9 ÷ 2 = 4.5

Wait — let’s double-check the options. Option C is 4.5, and D is 5.

But the question says “Find the median...” and lists 2,3,4,5,5,7.

Position: 1st=2, 2nd=3, 3rd=4, 4th=5, 5th=5, 6th=7.

Middle positions are 3rd and 4th → values 4 and 5 → average = 4.5.

✔ So the correct answer should be C) 4.5

*(Note: It seems there may be an error in the quiz if D is marked as correct, but mathematically, C is correct.)*

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3. If you score 76, 85, 97, and 83 on your math tests, what would your median score be?

✔ Correct Answer: D) 84

Explanation:
First, arrange the scores in ascending order:
→ 76, 83, 85, 97

There are 4 scores (even number), so median = average of the two middle scores (2nd and 3rd):

- Middle scores: 83 and 85
- Median = (83 + 85) ÷ 2 = 168 ÷ 2 = 84

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4. A data set can have more than one median?

✔ Correct Answer: B) False

Explanation:
By definition, the *median* is the middle value (or average of two middle values) of an ordered data set. There is always exactly one median for any data set — it’s a single value that divides the data into two equal halves.

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5. A data set can have more than one mode

✔ Correct Answer: B) True

Explanation:
The *mode* is the value that appears most frequently. A data set can have:

- One mode (unimodal)
- Two modes (bimodal)
- More than two modes (multimodal)
- Or no mode at all (if all values appear equally)

Example: {1, 2, 2, 3, 3} → modes are 2 and 3 → bimodal

So yes, it can have more than one mode.

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6. To find the average or mean of a set of numbers, add up all the items and divide by...

✔ Correct Answer: C) The number of items

Explanation:
This is the standard formula for mean:

> Mean = (Sum of all values) ÷ (Number of values)

It’s not divided by max, min, or 2 — only by the total count of items.

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7. What is the range?

✔ Correct Answer: A) biggest - smallest

Explanation:
The *range* measures how spread out the data is. It is calculated as:

> Range = Maximum value – Minimum value

Example: For data {3, 7, 10}, range = 10 – 3 = 7.

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✔ Final Answers Summary:

1. C) 8
2. C) 4.5 *(mathematically correct — check if quiz has typo)*
3. D) 84
4. B) False
5. B) True
6. C) The number of items
7. A) biggest - smallest

Let me know if you’d like help with questions 8–12 too!