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Dot Plots: Finding the Median — Easy Worksheet 2
Grade 10 · Whoobee Name: ____________________ Date: __________
Find the median of the data in each dot plot.
How to solve
Each dot is one data value, and a dot plot already puts the values in order from left to right, so count dots from the left. The median is the middle dot, not the middle of the number line. With an odd number of values the median is the middle one. With an even number it is halfway between the two middle values. Example: S = [3, 5, 6, 9] has middle values 5 and 6, so the median is (5 + 6) ÷ 2 = 5.5.
Example
The dot plot shows the number of hours of sleep for 7 students. Each dot stands for one student. The same data as a list: S = [4, 4, 11, 8, 7, 5, 4]. What is the median number of hours of sleep?
Answer: 5
Not quite. The answer is
💡 There are 9 dots, one for each student. The middle dot is dot number 5, because there are 4 dots on each side of it. Count from the left: 14 has dot 1, 15 has dot 2, 16 has dot 3, 18 has dots 4–5. Dot number 5 is above 18, so the median is 18.
✓ Correct!
Not quite. The answer is
💡 There are 9 dots, one for each student. The middle dot is dot number 5, because there are 4 dots on each side of it. Count from the left: 14 has dot 1, 15 has dot 2, 16 has dot 3, 18 has dots 4–5. Dot number 5 is above 18, so the median is 18.
💡 How to solve: Dot Plots: Finding the Median
Each dot is one data value, and a dot plot already puts the values in order from left to right, so count dots from the left. The median is the middle dot, not the middle of the number line. With an odd number of values the median is the middle one. With an even number it is halfway between the two middle values. Example: S = [3, 5, 6, 9] has middle values 5 and 6, so the median is (5 + 6) ÷ 2 = 5.5.
Try a similar one
The dot plot shows the number of push-ups done in one minute for 9 students. Each dot stands for one student. The same data as a list: S = [21, 27, 18, 24, 15, 27, 22, 15, 17]. What is the median number of push-ups done in one minute?
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 There are 9 dots, one for each student. The middle dot is dot number 5, because there are 4 dots on each side of it. Count from the left: 5 has dot 1, 6 has dot 2, 8 has dots 3–4, 9 has dots 5–7. Dot number 5 is above 9, so the median is 9.
✓ Correct!
Not quite. The answer is
💡 There are 9 dots, one for each student. The middle dot is dot number 5, because there are 4 dots on each side of it. Count from the left: 5 has dot 1, 6 has dot 2, 8 has dots 3–4, 9 has dots 5–7. Dot number 5 is above 9, so the median is 9.
💡 How to solve: Dot Plots: Finding the Median
Each dot is one data value, and a dot plot already puts the values in order from left to right, so count dots from the left. The median is the middle dot, not the middle of the number line. With an odd number of values the median is the middle one. With an even number it is halfway between the two middle values. Example: S = [3, 5, 6, 9] has middle values 5 and 6, so the median is (5 + 6) ÷ 2 = 5.5.
Try a similar one
The dot plot shows the high temperature in °C for 9 days. Each dot stands for one day. The same data as a list: S = [18, 19, 22, 24, 13, 24, 23, 18, 21]. What is the median high temperature in °C?
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 There are 9 dots, one for each student. The middle dot is dot number 5, because there are 4 dots on each side of it. Count from the left: 5 has dots 1–2, 6 has dot 3, 7 has dots 4–7. Dot number 5 is above 7, so the median is 7.
✓ Correct!
Not quite. The answer is
💡 There are 9 dots, one for each student. The middle dot is dot number 5, because there are 4 dots on each side of it. Count from the left: 5 has dots 1–2, 6 has dot 3, 7 has dots 4–7. Dot number 5 is above 7, so the median is 7.
💡 How to solve: Dot Plots: Finding the Median
Each dot is one data value, and a dot plot already puts the values in order from left to right, so count dots from the left. The median is the middle dot, not the middle of the number line. With an odd number of values the median is the middle one. With an even number it is halfway between the two middle values. Example: S = [3, 5, 6, 9] has middle values 5 and 6, so the median is (5 + 6) ÷ 2 = 5.5.
Try a similar one
The dot plot shows the number of rainy days for 9 months. Each dot stands for one month. The same data as a list: S = [15, 9, 9, 9, 9, 13, 20, 18, 13]. What is the median number of rainy days?
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 There are 9 dots, one for each day. The middle dot is dot number 5, because there are 4 dots on each side of it. Count from the left: 14 has dot 1, 15 has dot 2, 17 has dot 3, 18 has dot 4, 20 has dot 5. Dot number 5 is above 20, so the median is 20.
✓ Correct!
Not quite. The answer is
💡 There are 9 dots, one for each day. The middle dot is dot number 5, because there are 4 dots on each side of it. Count from the left: 14 has dot 1, 15 has dot 2, 17 has dot 3, 18 has dot 4, 20 has dot 5. Dot number 5 is above 20, so the median is 20.
💡 How to solve: Dot Plots: Finding the Median
Each dot is one data value, and a dot plot already puts the values in order from left to right, so count dots from the left. The median is the middle dot, not the middle of the number line. With an odd number of values the median is the middle one. With an even number it is halfway between the two middle values. Example: S = [3, 5, 6, 9] has middle values 5 and 6, so the median is (5 + 6) ÷ 2 = 5.5.
Try a similar one
The dot plot shows the number of text messages sent in one hour for 9 teens. Each dot stands for one teen. The same data as a list: S = [9, 13, 10, 11, 2, 2, 2, 8, 10]. What is the median number of text messages sent in one hour?
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 There are 9 dots, one for each student. The middle dot is dot number 5, because there are 4 dots on each side of it. Count from the left: 2 has dots 1–3, 4 has dot 4, 5 has dot 5. Dot number 5 is above 5, so the median is 5.
✓ Correct!
Not quite. The answer is
💡 There are 9 dots, one for each student. The middle dot is dot number 5, because there are 4 dots on each side of it. Count from the left: 2 has dots 1–3, 4 has dot 4, 5 has dot 5. Dot number 5 is above 5, so the median is 5.
💡 How to solve: Dot Plots: Finding the Median
Each dot is one data value, and a dot plot already puts the values in order from left to right, so count dots from the left. The median is the middle dot, not the middle of the number line. With an odd number of values the median is the middle one. With an even number it is halfway between the two middle values. Example: S = [3, 5, 6, 9] has middle values 5 and 6, so the median is (5 + 6) ÷ 2 = 5.5.
Try a similar one
The dot plot shows the number of hours of sleep for 9 students. Each dot stands for one student. The same data as a list: S = [11, 8, 12, 3, 11, 4, 6, 11, 12]. What is the median number of hours of sleep?
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 There are 9 dots, one for each student. The middle dot is dot number 5, because there are 4 dots on each side of it. Count from the left: 3 has dot 1, 5 has dot 2, 6 has dots 3–4, 7 has dot 5. Dot number 5 is above 7, so the median is 7.
✓ Correct!
Not quite. The answer is
💡 There are 9 dots, one for each student. The middle dot is dot number 5, because there are 4 dots on each side of it. Count from the left: 3 has dot 1, 5 has dot 2, 6 has dots 3–4, 7 has dot 5. Dot number 5 is above 7, so the median is 7.
💡 How to solve: Dot Plots: Finding the Median
Each dot is one data value, and a dot plot already puts the values in order from left to right, so count dots from the left. The median is the middle dot, not the middle of the number line. With an odd number of values the median is the middle one. With an even number it is halfway between the two middle values. Example: S = [3, 5, 6, 9] has middle values 5 and 6, so the median is (5 + 6) ÷ 2 = 5.5.
Try a similar one
The dot plot shows the number of text messages sent in one hour for 9 teens. Each dot stands for one teen. The same data as a list: S = [18, 18, 12, 9, 20, 20, 19, 18, 14]. What is the median number of text messages sent in one hour?
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 There are 9 dots, one for each day. The middle dot is dot number 5, because there are 4 dots on each side of it. Count from the left: 11 has dot 1, 12 has dots 2–3, 15 has dots 4–5. Dot number 5 is above 15, so the median is 15.
✓ Correct!
Not quite. The answer is
💡 There are 9 dots, one for each day. The middle dot is dot number 5, because there are 4 dots on each side of it. Count from the left: 11 has dot 1, 12 has dots 2–3, 15 has dots 4–5. Dot number 5 is above 15, so the median is 15.
💡 How to solve: Dot Plots: Finding the Median
Each dot is one data value, and a dot plot already puts the values in order from left to right, so count dots from the left. The median is the middle dot, not the middle of the number line. With an odd number of values the median is the middle one. With an even number it is halfway between the two middle values. Example: S = [3, 5, 6, 9] has middle values 5 and 6, so the median is (5 + 6) ÷ 2 = 5.5.
Try a similar one
The dot plot shows the number of text messages sent in one hour for 9 teens. Each dot stands for one teen. The same data as a list: S = [12, 6, 11, 4, 11, 12, 11, 6, 4]. What is the median number of text messages sent in one hour?
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
Not quite. The answer is
💡 There are 9 dots, one for each student. The middle dot is dot number 5, because there are 4 dots on each side of it. Count from the left: 6 has dot 1, 7 has dot 2, 9 has dot 3, 11 has dots 4–5. Dot number 5 is above 11, so the median is 11.
✓ Correct!
Not quite. The answer is
💡 There are 9 dots, one for each student. The middle dot is dot number 5, because there are 4 dots on each side of it. Count from the left: 6 has dot 1, 7 has dot 2, 9 has dot 3, 11 has dots 4–5. Dot number 5 is above 11, so the median is 11.
💡 How to solve: Dot Plots: Finding the Median
Each dot is one data value, and a dot plot already puts the values in order from left to right, so count dots from the left. The median is the middle dot, not the middle of the number line. With an odd number of values the median is the middle one. With an even number it is halfway between the two middle values. Example: S = [3, 5, 6, 9] has middle values 5 and 6, so the median is (5 + 6) ÷ 2 = 5.5.
Try a similar one
The dot plot shows the number of hours of sleep for 9 students. Each dot stands for one student. The same data as a list: S = [8, 11, 10, 12, 3, 7, 4, 5, 5]. What is the median number of hours of sleep?
✓ You've got it! Press Next to keep going. Not yet — the answer is . Read the steps above once more.
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Dot Plots: Finding the Median — Easy Worksheet 2
Find the median of the data in each dot plot.