The mean from a frequency list

Difficulty Stretch · Set 3v12mc

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1
In a survey, 13 appeared 2 times, 7 appeared 5 times, 10 appeared 5 times, 5 appeared 1 time and 20 appeared 5 times. What is the mean value?
2
In a survey, 12 appeared 1 time, 10 appeared 6 times, 14 appeared 5 times, 15 appeared 2 times and 2 appeared 4 times. What is the mean value?
3
In a survey, 18 appeared 1 time, 16 appeared 5 times, 1 appeared 4 times, 3 appeared 3 times and 19 appeared 4 times. What is the mean value?
4
In a survey, 19 appeared 2 times, 16 appeared 1 time, 5 appeared 4 times, 8 appeared 5 times and 7 appeared 3 times. What is the mean value?
5
In a survey, 1 appeared 2 times, 4 appeared 5 times, 34 appeared 1 time, 14 appeared 6 times and 10 appeared 6 times. What is the mean value?
6
In a survey, 20 appeared 4 times, 8 appeared 3 times, 17 appeared 2 times, 18 appeared 2 times and 30 appeared 1 time. What is the mean value?
7
In a survey, 11 appeared 2 times, 3 appeared 5 times, 18 appeared 2 times, 17 appeared 1 time and 1 appeared 6 times. What is the mean value?
8
In a survey, 19 appeared 3 times, 20 appeared 1 time, 9 appeared 3 times, 2 appeared 2 times and 8 appeared 3 times. What is the mean value?
9
In a survey, 2 appeared 4 times, 9 appeared 1 time, 3 appeared 6 times, 5 appeared 6 times and 15 appeared 2 times. What is the mean value?
10
In a survey, 9 appeared 2 times, 6 appeared 3 times, 5 appeared 1 time, 12 appeared 2 times and 13 appeared 5 times. What is the mean value?
11
In a survey, 15 appeared 1 time, 20 appeared 2 times, 7 appeared 4 times, 19 appeared 6 times and 6 appeared 4 times. What is the mean value?
12
In a survey, 1 appeared 2 times, 5 appeared 4 times, 9 appeared 1 time, 6 appeared 4 times and 19 appeared 3 times. What is the mean value?
13
In a survey, 6 appeared 1 time, 11 appeared 6 times, 12 appeared 2 times, 1 appeared 3 times and 4 appeared 5 times. What is the mean value?
14
In a survey, 8 appeared 2 times, 4 appeared 6 times, 12 appeared 1 time, 7 appeared 5 times and 5 appeared 3 times. What is the mean value?
15
In a survey, 22 appeared 1 time, 20 appeared 2 times, 18 appeared 6 times, 14 appeared 5 times and 5 appeared 3 times. What is the mean value?
16
In a survey, 21 appeared 1 time, 19 appeared 3 times, 20 appeared 3 times, 15 appeared 4 times and 18 appeared 3 times. What is the mean value?
17
In a survey, 19 appeared 1 time, 7 appeared 4 times, 3 appeared 5 times, 5 appeared 2 times and 2 appeared 4 times. What is the mean value?
18
In a survey, 2 appeared 4 times, 17 appeared 5 times, 15 appeared 2 times, 19 appeared 4 times and 9 appeared 1 time. What is the mean value?
19
In a survey, 17 appeared 3 times, 10 appeared 5 times, 28 appeared 1 time, 1 appeared 3 times and 11 appeared 6 times. What is the mean value?
20
In a survey, 5 appeared 3 times, 9 appeared 3 times, 13 appeared 1 time, 6 appeared 4 times and 1 appeared 6 times. What is the mean value?

What is in this set

The numbers in this set run from 1 to 39.
Every problem in it will come as a list of values with how often each one appeared.
A careful solution takes 7 written steps on average.
The mistake this set invites most often, in 100% of the problems: the total was divided by 5, the number of rows.
Answers are a whole number.

Drawing 240 problems from this page produced 240 different ones, 100% — so a sheet of 20 is a new sheet almost every time.

The same skill, harder or easier

We would put this in front of a grade 7 class. That is our judgement, not a standard, and it is printed here so you can disagree with it. Everything else we put in that year.

Next to this

The mean of a set of decimals

Numbers 0.05–12.05; every one will average values that are decimals.

The range

Numbers 2–120.

All of averages and range

7 skills in this topic, 21 sets between them.

Printing it

The printed sheet carries no menus and no advertising, and the answer key is on its own page.