Compare two groups using the mean or median

Answer Key - Grade 7 Math Worksheet

Circle the best answer, or write your answer on the line.

1. 1.

   Esme measured standing long jumps for the track club and the dance club, in inches. The dancers landed with style. How much greater is the median for the track club than for the dance club?

   4
2. 2.

   Jun ran a one-minute typing test for two clubs. The keyboards clicked like popcorn. How much greater is the median for the keyboard club than for the art club?

   5
3. 3.

   Kira asked riders in two bike clubs how many miles they biked this week. The trail club came back muddy. How much greater is the median for the trail club than for the city club?

   4
4. 4.

   Two classes took the same 25-word spelling quiz, and Noah plotted the scores. The word "rhythm" caused some sighs. How much greater is the mean for the first class than for the second class?

   3.5
5. 5.

   Pia counted birds at a seed feeder and a fruit feeder each morning for a week. One bird looked proud. How much greater is the mean for the seed feeder than for the fruit feeder?

   4
6. 6.

   On a class trip, Ren counted the shells each student collected at two beaches. A crab kept watch. How much greater is the range for the north beach than for the south beach?

   9
7. 7.

   Tala asked two violin groups how many minutes they practiced on Saturday. The beginners' violins squeaked bravely. How much greater is the range for the beginner group than for the advanced group?

   14
8. 8.

   Zee counted the pages each student read during reading time in two classes. Someone read so fast the pages fluttered. How much greater is the range for the first class than for the second class?

   10
9. 9.

   Players at two basketball camps each took 80 free throws, and Bo plotted the shots made. One Elm camp player could not miss. Which sentence do the dot plots support?

   • The Oak camp players tend to make more shots, because the median for the Oak camp players is greater.
   • The two groups are about the same, because both plots have seven dots.
   • The Elm camp players tend to make more shots, because the right-most dot belongs to the Elm camp players.
   • Every Oak camp player made more shots than every Elm camp player.
10. 10.

    Jun asked the Owl and Fox reading clubs how many books each member read over the summer. One Fox reader read in every spare minute. Which sentence do the dot plots support?

    • The Owl readers tend to read more books, because the median for the Owl readers is greater.
    • The Fox readers tend to read more books, because the right-most dot belongs to the Fox readers.
    • Every Owl reader read more books than every Fox reader.
    • The two groups are about the same, because both plots have seven dots.