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Question 1 of 6
Find the mean
1 |
3 |
4 |
5 |
5 |
6 |
7 |
7 |
12 |
Round your answer to one decimal place
Incorrect
Remember
∑x is the sum of all the given values.
N is the number of given values.
First, solve for the sum of the given values.
∑x |
= |
1+3+4+5+5+6+7+7+12 |
|
= |
50 |
Evaluate |
Next, divide the sum of all values (∑x) by the number of values (N).
Mean |
= |
∑xN |
Finding the mean |
|
|
= |
509 |
There are 9 given values |
|
|
= |
5.6 |
Rounded to one decimal place |
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Question 2 of 6
Find the mode
1 |
1 |
2 |
2 |
2 |
2 |
2 |
3 |
3 |
4 |
4 |
|
Incorrect
The mode of a data set is the value with the highest frequency
We need to identify the value that appeared most from the data set.
1 |
1 |
2 |
2 |
2 |
2 |
2 |
3 |
3 |
4 |
4 |
|
We can see that the value 2 occured five times, and is the most frequent value of the data set.
Therefore, the mode for this data set is 2
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Question 3 of 6
Incorrect
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The median is the middle value of a data set.
If there are two middle values on a data set, we get their sum and halve it to get the median.
First, arrange the values of the data set in ascending order
We can see that the values 6 and 6 are the middle values of the data set.
To find the median, we add the two middle values and divide it by 2
Median |
= |
6+62 |
|
|
= |
122 |
|
|
= |
6 |
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Question 4 of 6
Find the median
5 |
3 |
3 |
7 |
9 |
11 |
6 |
5 |
5 |
5 |
6 |
5 |
9 |
7 |
9 |
3 |
Incorrect
The median is the middle value of a data set.
If there are two middle values on a data set, we get their sum and halve it to get the median.
First, arrange the values of the data set in ascending order
3 |
3 |
3 |
5 |
5 |
5 |
5 |
5 |
6 |
6 |
7 |
7 |
9 |
9 |
9 |
11 |
We can see that the values 5 and 6 are the middle values of the data set.
To find the median, we add the two middle values and divide it by 2
Median |
= |
5+62 |
|
|
= |
112 |
|
|
= |
5.5 |
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Question 5 of 6
Incorrect
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Remember
The range of a data set is simply the difference between the largest and smallest values.
First, find the highest and the lowest score.
Highest Score |
= |
8 |
Lowest Score |
= |
−5 |
Finally, subtract the lowest score from the highest score to get the range
Range |
= |
Highest Score−Lowest Score |
Finding the range |
|
= |
8−(−5) |
Substitute values |
|
= |
13 |
Evaluate |
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Question 6 of 6
Find the range
36 |
27 |
30.1 |
35.7 |
32.1 |
47.3 |
28.3 |
25.3 |
36 |
43.9 |
39.7 |
26.3 |
25.1 |
19 |
27.4 |
36.1 |
|
|
|
|
Incorrect
Remember
The range of a data set is simply the difference between the largest and smallest values.
First, find the highest and the lowest score.
Highest Score |
= |
47.3 |
Lowest Score |
= |
19 |
Finally, subtract the lowest score from the highest score to get the range
Range |
= |
Highest Score−Lowest Score |
Finding the range |
|
= |
47.3−19 |
Substitute values |
|
= |
28.3 |
Evaluate |