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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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A jet travels 4680 miles against the wind in eight hours and 5720 miles in the wind in the same amount of time what is the rate
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9514 1404 393

Answer:

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Step-by-step explanation:

The speed against the wind is ...

  4680 mi/(8 h) = 585 mi/h

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The speed of the wind is the difference between the airplane speed and the speed in the wind:

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_____

<em>Additional comment</em>

If p and 'a' represent the speeds of the plane and the air, the speeds with and against the wind are ...

  p + a = with

  p - a = against

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8 0
3 years ago
Question 1
zhannawk [14.2K]

Answer:

12

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6 0
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The relative frequency approach to probability uses long term relative frequencies, often based on past data.
xenn [34]

Answer:

True

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Relative frequency is the ratio of the occurrence of a singular event and the total number of outcomes. This is a tool that is often used after you collect data. You can compare a single part of the data to the total amount of data collected.

For example, if a particular machine produces 50,000 widgets one at a time, and 5,000 of those widgets are faulty, the probability of that machine producing a faulty widget is approximately 5,000 out of 50,000, or 0.10.

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3 years ago
Look at Andrea’s running journal.
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First align the decimal points and the numbers,  then add the extra 0's if needed. Lastly, add and the total answer is 14.225.

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3 years ago
Read 2 more answers
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