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shepuryov [24]
3 years ago
13

Fifteen 7th graders were asked how many hours they spend doing homework each week and how many hours they spend watching televis

ion each week. the results are shown in the dot plots below

Mathematics
1 answer:
timama [110]3 years ago
3 0

Answer:

A.

  • 18 > 14, true

B.

  • 12 - 16 = -4, true

C.

<u>Mean:</u>

  • Homework = (4 + 6*2+10*3+12*2+14*4+16*2+18)/15 = 11.73
  • Television = (0 + 10*3+12*1+16*3+18*4+20*3)/15 = 14.8

<u>The difference:</u>

  • 14.8 - 11.73 > 1, NOT true

D.

  • True
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