Histograms, and which graph fits the data

Answer Key - Grade 7 Math Worksheet - Challenge Me

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

1. 1.

   Noah has 120 quiz scores that run from 20 to 80 (the quiz fit on a postcard). Which bar width gives a histogram that shows the shape?

   • Bars 1 wide, because every value gets its own bar (about 60 bars).
   • Bars 60 wide, because one bar is the simplest to read.
   • Bars 10 wide, because they make 6 bars, enough to show the shape.
2. 2.

   Pia has 90 reading times in minutes that run from 0 to 60 (the lamp stayed on). Which bar width gives a histogram that shows the shape?

   • Bars 1 wide, because every value gets its own bar (about 60 bars).
   • Bars 60 wide, because one bar is the simplest to read.
   • Bars 10 wide, because they make 6 bars, enough to show the shape.
3. 3.

   Ren has 150 resting heart rates in beats per minute that run from 50 to 100 (the pulse stayed steady). Which bar width gives a histogram that shows the shape?

   • Bars 1 wide, because every value gets its own bar (about 50 bars).
   • Bars 50 wide, because one bar is the simplest to read.
   • Bars 10 wide, because they make 5 bars, enough to show the shape.
4. 4.

   Zee reads the histogram of minutes of homework (the pencils got short). Which bar holds the median?

   • The bar from 10 up to 15.
   • The bar from 20 up to 25.
   • The bar from 25 up to 30.
   • The bar from 15 up to 20.
5. 5.

   Ari reads the histogram of minutes spent on a video call (the screen froze once). Which bar holds the median?

   • The bar from 0 up to 20.
   • The bar from 20 up to 40.
   • The bar from 60 up to 80.
   • The bar from 40 up to 60.
6. 6.

   Esme took a random sample and drew the histogram of minutes of exercise in a week (the ball rolled away). Which statement does the sample support?

   • The sample suggests most of the students exercise 40 up to 60 minutes; a fair guess, not proof.
   • The sample suggests most of the students exercise less than 20 minutes; a fair guess, not proof.
   • The sample suggests most of the students exercise 20 minutes or more; a fair guess, not proof.
   • The sample suggests every student exercises 20 minutes or more; a fair guess, not proof.
7. 7.

   Jun took a random sample and drew the histogram of pages read in a night (the lamp stayed on). Which statement does the sample support?

   • The sample suggests most of the students read 10 pages or more; a fair guess, not proof.
   • The sample suggests most of the students read 5 up to 10 pages; a fair guess, not proof.
   • The sample suggests most of the students read less than 10 pages; a fair guess, not proof.
   • The sample suggests every student reads 10 pages or more; a fair guess, not proof.
8. 8.

   Kira reads the histogram of quiz scores (the quiz had a smiley face). What percent of the 80 students scored 80 points or more?

   45
9. 9.

   Luz reads the histogram of miles biked in a month (the bell rang). What percent of the 50 riders biked 20 miles or more?

   28
10. 10.

    Milo reads the histogram of minutes spent on homework (the pencils got worn down). What percent of the 40 students spent 45 minutes or more?

    25