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1st Period - Extra Practice 4.3
Contributed by: Morgan
(Original author: O'Kane)
3
What is the most common number ?
4
3
6
2
3
(The mode)
What is the middle number ?
1
2
3
5
7
10
(The median)
11
Subtract the largest number
from the smallest number
1
2
3
5
7
10
(The range)
11
mean =
1
To get the mean...
Divide answer a (total) by answer b (how many numbers)
answer a
answer b
How many numbers are there?
What is the total of these number ?
3
3
÷
5
8
=
After you have put these numbers in order,
what is the middle number ?
(The median)
1
7
5
2
4
5
5
6
What is  the mode ?
4
2
4
4
7
9
5
6
What is  the modal value ?
4
2
7
7
7
What is the median of these numbers?
3
Hint : half way
4
6
8
9
9
What is the range of values?
23
5
7
3
6
14
Find the mean of 4 and 12
Find the mean, mode, median and range
 of these numbers
median =
mode =
4
4
8
9
mean =
range =
10
Frequency
What is the modal  grade?
A
B
C
D
E
Grades
Science
8
6
4
2
0
Pupils tests results in Maths and Science
●
●
2
●
4
●
Maths
What is the range of marks
for the Maths test?
6
●
8
●
10
●
12
Find the mean
Mean =
Time
(mins)
2
4
1
3
total
Frequency
10

4

2

3

1
÷
10
Total
=

 

Time x Frequency
4

3

6
Estimate mean =
Find an estimate of the mean
Time
1≤ x < 3

3 ≤ x < 5

7 ≤ x < 9

5 ≤ x < 7

(mins)
Frequency
10

3

4

2
1
total
x
Midpoint
4

2

6
÷
Total
10
=
=

 

Midpoint x Frequency

16

8

6

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