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elena55 [62]
3 years ago
13

HELPPPPPPPPPPP

Mathematics
1 answer:
True [87]3 years ago
5 0

Answer:

Part A

  • C. 7.25

Part B

  • B. Ryan Shafer has been more consistent because his mean absolute deviation is less than Norm Duke’s.

Step-by-step explanation:

<u>Given data:</u>

  • 299, 281, 285, 269, 280, 269, 286, 287
<h3>Part A</h3>

<u>Find the mean of the data above:</u>

  • (299 + 281 + 285 + 269 + 280 + 269 + 286 + 287)/8 = 282

<u>Find absolute deviations, an absolute value of the difference of data and the mean:</u>

  • 299 - 282 = 17 ⇒ 17
  • 281 - 282 = -1 ⇒ 1
  • 285 - 282 = 3 ⇒ 3
  • 269 - 282 = -13 ⇒ 13
  • 280 - 282 = 2 ⇒ 2
  • 269 - 282 = -13 ⇒ 13
  • 286 - 282 = 4 ⇒ 4
  • 287 - 282 = 5  ⇒ 5

<u>Find mean absolute deviation:</u>

  • (17 + 1 + 3 + 13 + 2 + 13 + 4 + 5)/8 = 7.25

Correct choice is C

<h3>Part B</h3>

Less mean absolute deviation is the sign of more consistent data.

Since Ryan Shafer has smaller mean absolute deviation, he has been more consistent 7 < 7.25

Correct choice is B.

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