To find the mean, you add up all the values and divide by the total number of values. In this case, the values are 2, 4, 4, 2. Adding them up gives 12, and dividing by 4 gives a mean of 3.
To find the median, you arrange the values in numerical order and find the middle value. In this case, the values are already in order: 2, 2, 4, 4. The middle values are 2 and 4. To find the average of those, you add them up and divide by 2, giving a median of 3.
To find the spread, you subtract the lowest value from the highest value. In this case, the lowest value is 2 and the highest value is 4. Subtracting, the spread is 2.
Therefore, the mean is 3, the median is 3, and the spread is 2.
Statistics Unit Test
5 of 155 of 15 Items
Question
Use the image to answer the question.
An illustration shows a bar graph with four bars extending vertically from the x-axis. The horizontal axis ranges from 10 to 13 in increments of 1 and the vertical axis ranges from 0 to 5 in increments of 1. The bar placed at 10 on the x-axis extends to 2 on the y-axis. The bar placed at 11 on the x-axis extends to 4 on the y-axis. The bar placed at 12 on the x-axis extends to 4 on the y-axis. The bar placed at 13 on the x-axis extends to 2 on the y-axis.
What are the values of the mean, median, and spread for the dataset shown in the bar graph?
(2 points)
The mean =
.
The median =
.
The spread =
.
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